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<h2 class="links">List now available on the NIST Research Library's website</h2>
<p><a href="https://nist.primo.exlibrisgroup.com/discovery/collectionDiscovery?vid=01NIST_INST:01NIST&collectionId=8126389780008106">Letter Circular</a></p>
<hr>
<h2 class="outdated">List updated 2024-03-13-04:00</h2>
<h3 class="type-head" id="LCIRC">LCIRC</h3>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 811: publications relating to building codes and construction practice home building --
building material specifications -- home maintenance (superseding Letter Circular
796)</span><br><span class="publication_date"><label class="label">Date Published: </label>1945</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 811r1945</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.811r1945</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular811r1945.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.811r1945.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1: notes on the relation of the crimp of the filling to the contraction in width after
weaving</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 10: list of communications of the gage section</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 10</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.10</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular10.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.10.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 100: oil heating</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 100</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.100</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular100.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.100.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1000: publications relating to building construction and maintenance (supersedes Letter
Circular 985)</span><br><span class="publication_date"><label class="label">Date Published: </label>1951</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1000</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1000</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1000.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1000.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1001: liquefied petroleum gas as an engine fuel</span><br><span class="publication_date"><label class="label">Date Published: </label>1951</span><br><span class="authors"><label class="label">Authors: </label>Frank L Howard</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1001</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1001</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1001.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1001.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1002: general tables of weights and measures (supersedes Letter Circular 682)</span><br><span class="publication_date"><label class="label">Date Published: </label>1952</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1002</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1002</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1002.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1002.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1003: pneumatic tires</span><br><span class="publication_date"><label class="label">Date Published: </label>1951</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1003</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1003</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1003.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1003.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1004: light-sensitive paper no. 1554, directions for use in testing textiles for colorfastness
to light (superseding Letter Circular 934)</span><br><span class="publication_date"><label class="label">Date Published: </label>1951</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1004</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1004</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1004.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1004.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1006: house plan services (supersedes Letter Circular 927)</span><br><span class="publication_date"><label class="label">Date Published: </label>1955</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1006</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1006</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1006.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1006.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1007: artificial abrasives and abrasive products (replaces Letter Circular 917)</span><br><span class="publication_date"><label class="label">Date Published: </label>1951</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1007</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1007</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1007.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1007.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1008: textile testing equipment (superseding Letter Circular 907)</span><br><span class="publication_date"><label class="label">Date Published: </label>1952</span><br><span class="authors"><label class="label">Authors: </label>Josephine M Blandford</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1008</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1008</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1008.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1008.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 101: U.S. petroleum oil tables</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 101</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.101</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular101.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.101.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1010: physical properties of currently produced marbles</span><br><span class="publication_date"><label class="label">Date Published: </label>1953</span><br><span class="authors"><label class="label">Authors: </label>Arthur Hockman</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1010</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1010</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1010.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1010.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1012: light-sensitive paper, directions for use in testing textiles for colorfastness to
light</span><br><span class="publication_date"><label class="label">Date Published: </label>1953</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1012</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1012</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1012.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1012.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1013: methods for electroplating metals on nonconducting materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1953</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1013r1953</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1013r1953</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1013r1953.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1013r1953.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1015: artificial abrasives and abrasive products</span><br><span class="publication_date"><label class="label">Date Published: </label>1954</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1015</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1015</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1015.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1015.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1016: light-sensitive paper for use in testing textiles in colorfastness to light</span><br><span class="publication_date"><label class="label">Date Published: </label>1955</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1016r1955</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1016r1955</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1016r1955.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1016r1955.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1017: standards for checking the calibration of spectrophotometers (200 to 1000 m?)+J1051:L1051</span><br><span class="publication_date"><label class="label">Date Published: </label>1955</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1017</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1017</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1017.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1017.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1017: standards for checking the calibration of spectrophotometers (200 to 1000 m?)</span><br><span class="publication_date"><label class="label">Date Published: </label>1967</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1017r1967</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1017r1967</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1017r1967.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1017r1967.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1018: dampness in masonry walls above grade (supersedes Letter Circular 865)</span><br><span class="publication_date"><label class="label">Date Published: </label>1955</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1018</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1018</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1018.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1018.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1019: National Bureau of Standards reports</span><br><span class="publication_date"><label class="label">Date Published: </label>1963</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1019r1963</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1019r1963</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1019r1963.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1019r1963.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1019: National Bureau of Standards reports</span><br><span class="publication_date"><label class="label">Date Published: </label>1965</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1019r1965</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1019r1965</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1019r1965.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1019r1965.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1019: National Bureau of Standards reports</span><br><span class="publication_date"><label class="label">Date Published: </label>1966</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1019r1966</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1019r1966</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1019r1966.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1019r1966.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 102: tests of radio receiving sets, III</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 102</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.102</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular102.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.102.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1020: motor gasoline (supersedes Letter Circular 991, 551 and 281)</span><br><span class="publication_date"><label class="label">Date Published: </label>1955</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1020</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1020</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1020.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1020.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1021: list of weights and measures offices of the States, territories, District of Columbia,
and organized island possessions of the United States</span><br><span class="publication_date"><label class="label">Date Published: </label>1955</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1021r1955</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1021r1955</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1021r1955.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1021r1955.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1022: revised ISCC-NBS color designations for the colors of the standard color cards issued
by the textile color card association of the United States</span><br><span class="publication_date"><label class="label">Date Published: </label>1956</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1022</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1022</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1022.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1022.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1023: standard frequencies and time signals WWV and WWVH (supersedes Letter Circular 1009)</span><br><span class="publication_date"><label class="label">Date Published: </label>1956</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1023</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1023</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1023.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1023.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1024: standard light-sensitive paper for use in testing textiles for colorfastness to light
(supersedes Letter Circular 1016)</span><br><span class="publication_date"><label class="label">Date Published: </label>1956</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1024r1956</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1024r1956</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1024r1956.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1024r1956.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1025: National Bureau of Standards electron devices data service</span><br><span class="publication_date"><label class="label">Date Published: </label>1956</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1025</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1025</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1025.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1025.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1026: methods of calibration and testing of hygrometers</span><br><span class="publication_date"><label class="label">Date Published: </label>1957</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1026</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1026</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1026.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1026.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1027: list of weights and measures offices of the States, territories, District of Columbia,
and organized island possessions of the United States</span><br><span class="publication_date"><label class="label">Date Published: </label>1957</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1027r1957</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1027r1957</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1027r1957.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1027r1957.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1028: nomenclature of copper alloys - brass and bronze</span><br><span class="publication_date"><label class="label">Date Published: </label>1957</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1028</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1028</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1028.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1028.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1029: resolving -power chart</span><br><span class="publication_date"><label class="label">Date Published: </label>1958</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1029</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1029</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1029.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1029.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 103: description of a series of single-layer inductance coils suitable for radio-frequency
standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 103</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.103</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular103.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.103.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1030: polishes</span><br><span class="publication_date"><label class="label">Date Published: </label>1958</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1030</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1030</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1030.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1030.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1031: detergents and detergent aids</span><br><span class="publication_date"><label class="label">Date Published: </label>1958</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1031</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1031</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1031.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1031.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1032: sweeping compounds (also known as floor sweep and dust down)</span><br><span class="publication_date"><label class="label">Date Published: </label>1958</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1032</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1032</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1032.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1032.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1033: use of the international inch for reporting lengths of gage blocks</span><br><span class="publication_date"><label class="label">Date Published: </label>1959</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1033</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1033</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1033.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1033.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1035: units and systems of weights and measures their origin, development, and present status
(temporary replacement of Letter Circular 570)</span><br><span class="publication_date"><label class="label">Date Published: </label>1960</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1035</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1035</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1035.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1035.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1035: units and systems of weights and measures their origin, development, and present status</span><br><span class="publication_date"><label class="label">Date Published: </label>1985</span><br><span class="authors"><label class="label">Authors: </label>Lewis V Judson, Louis E Barbrow</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1035r1985</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1035r1985</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1035r1985.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1035r1985.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1036: standard light-sensitive paper for use in testing textiles for colorfastness to light</span><br><span class="publication_date"><label class="label">Date Published: </label>1963</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1036r1963</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1036r1963</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1036r1963.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1036r1963.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1038: the additive system of photographic exposure computation</span><br><span class="publication_date"><label class="label">Date Published: </label>1960</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1038</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1038</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1038.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1038.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1039: NBS standards for opacity meters (supersedes Letter Circular 418)</span><br><span class="publication_date"><label class="label">Date Published: </label>1961</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1039</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1039</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1039.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1039.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 104: heat treatment of steel</span><br><span class="publication_date"><label class="label">Date Published: </label>1918</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 104</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.104</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular104.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.104.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1040: list of state, commonwealth, and District weights and measures offices of the United
States</span><br><span class="publication_date"><label class="label">Date Published: </label>1962</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1040</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1040</span><br><a href="https://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1040r1962.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1040.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 105: application of statistical analysis to radio transmission problems</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 105</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.105</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular105.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.105.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 106: notes on upholstery leather specifications, II</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 106</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.106</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular106.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.106.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1067-1: codes for the names of countries; ISO standard 3166American National Standard Z39.27</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1067-1</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1067-1</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1067-1.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1067-1.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1068: the National Bureau of Standards program in nondestructive evaluation</span><br><span class="publication_date"><label class="label">Date Published: </label>1980</span><br><span class="authors"><label class="label">Authors: </label>Harold Berger</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1068</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1068</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1068.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1068.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1069: metric style guide for the news media</span><br><span class="publication_date"><label class="label">Date Published: </label>1976</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1069</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1069</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1069.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1069.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 107: emissivity of paints for radiators, canopies, etc.</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 107</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.107</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular107.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.107.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1070: some references on metric information including a chart on all you need to know about
metric (supersedes NBS special publication 389)</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1070</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1070</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1070.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1070.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1071: factors for high-precision conversion</span><br><span class="publication_date"><label class="label">Date Published: </label>1976</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1071</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1071</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1071.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1071.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1072: air & water pollution</span><br><span class="publication_date"><label class="label">Date Published: </label>1976</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1072</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1072</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1072.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1072.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1073: Institute for Computer Sciences & Technology</span><br><span class="publication_date"><label class="label">Date Published: </label>1976</span><br><span class="authors"><label class="label">Authors: </label>Dennis Donovan</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1073</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1073</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1073.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1073.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1074: smoke detectors - what they are and how they work</span><br><span class="publication_date"><label class="label">Date Published: </label>1976</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1074</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1074</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1074.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1074.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1075: the Center for Consumer Product Technology, measurement technology for the marketplace</span><br><span class="publication_date"><label class="label">Date Published: </label>1976</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1075</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1075</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1075.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1075.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1076: NBS Heat Division: an introduction</span><br><span class="publication_date"><label class="label">Date Published: </label>1976</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1076</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1076</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1076.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1076.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1078: the metric system of measurement (SI)</span><br><span class="publication_date"><label class="label">Date Published: </label>1976</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1078</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1078</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1078.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1078.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1078: the metric system of measurement (SI)</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1078r1977</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1078r1977</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1078r1977.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1078r1977.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1079: home security alarms - what they are and how they work</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1079</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1079</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1079.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1079.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 108: lead errors in commercial screw threads, taps, and dies</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label>DR Miller, IH Fullmer</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 108</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.108</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular108.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.108.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1080: NDE (nondestructive evaluation program0</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1080</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1080</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1080.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1080.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1080: NDE (nondestructive evaluation program0</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1080r1979</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1080r1979</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1080r1979.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1080r1979.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1081: fire research</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1081</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1081</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1081.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1081.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1082: a service manager's guide to saving energy in residential oil burners - optimizing
nozzle size</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1082</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1082</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1082.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1082.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1083: NBS intergovernmental personal exchange program - an invitation to state and local
governments and academic and public interest groups that serve them to join in research</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1083</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1083</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1083.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1083.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1085: how to improve the efficiency of your oil-fired furnace</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1085</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1085</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1085.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1085.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1086: National Bureau of Standards U.S. Department of Commerce research associate program</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1086</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1086</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1086.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1086.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1088: home security starts at your door</span><br><span class="publication_date"><label class="label">Date Published: </label>1976</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1088</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1088</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1088.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1088.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1088: La seguridad del hogar empieza en su puerta</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1088sp</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1088sp</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1088sp.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1088sp.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1091: building safety</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1091</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1091</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1091.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1091.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1092: the NBSDOE energy-related inventions program - synopsis of evaluation process</span><br><span class="publication_date"><label class="label">Date Published: </label>1980</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1092</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1092</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1092.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1092.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1093: the Norris Cotton Building, a living laboratory in energy conservation</span><br><span class="publication_date"><label class="label">Date Published: </label>1978</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1093</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1093</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1093.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1093.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1094: NBS standards information service</span><br><span class="publication_date"><label class="label">Date Published: </label>1978</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1094</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1094</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1094.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1094.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1095: films</span><br><span class="publication_date"><label class="label">Date Published: </label>1978</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1095</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1095</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1095.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1095.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1096: applied economics program staff</span><br><span class="publication_date"><label class="label">Date Published: </label>1978</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1096</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1096</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1096.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1096.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1097: applied economics program projects</span><br><span class="publication_date"><label class="label">Date Published: </label>1978</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1097</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1097</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1097.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1097.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1098: preferred metric units for general use by the federal government</span><br><span class="publication_date"><label class="label">Date Published: </label>1978</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1098</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1098</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1098.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1098.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 10: list of communications of the gage section</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 10r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.10r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular10r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.10r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 110: information on heating and ventilation</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 110</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.110</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular110.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.110.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1100: recommended reading for scientists and engineers</span><br><span class="publication_date"><label class="label">Date Published: </label>1978</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1100</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1100</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1100.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1100.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1101: environmental design research division office staff</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1101</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1101</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1101.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1101.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1102: sensory environment staff</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1102</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1102</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1102.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1102.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1103: architectural research staff</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1103</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1103</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1103.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1103.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1104: building acoustics staff</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1104</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1104</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1104.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1104.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1106: occupant safety and security staff</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1106</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1106</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1106.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1106.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1107: for consumers, practical information based on scientific research from the National
Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1107</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1107</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1107.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1107.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1108: knowledge, news, & facts you can use and enjoy</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1108</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1108</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1108.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1108.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1109: environmental design research division</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1109</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1109</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1109.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1109.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 111: characteristics, treatment and uses of high-speed tool steel</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 111</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.111</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular111.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.111.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1110: architectural research group</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1110</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1110</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1110.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1110.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1111: sensory environment group</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1111</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1111</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1111.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1111.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1112: building safety & security group</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1112</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1112</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1112.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1112.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1113: building acoustics & community noise group</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1113</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1113</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1113.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1113.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1114: building safety and security research areas</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1114</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1114</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1114.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1114.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1115: sensory environment research areas</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1115</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1115</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1115.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1115.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1116: building acoustics and community noise research areas</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1116</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1116</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1116.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1116.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1117: architectural research areas</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1117</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1117</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1117.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1117.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1118: fracture & deformation division</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1118</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1118</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1118.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1118.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1119: solar technology for buildings publications</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1119</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1119</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1119.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1119.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 112: twelve outstanding accomplishments of the Bureau of Standards in 1923</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 112</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.112</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular112.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.112.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1120: NBS guidelines for use of the metric system</span><br><span class="publication_date"><label class="label">Date Published: </label>1977</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1120r1977</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1120r1977</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1120r1977.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1120r1977.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1120: Guidelines for use of the modernized metric system (supersedes Letter Circular 1056)</span><br><span class="publication_date"><label class="label">Date Published: </label>1979</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1120r1979</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1120r1979</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1120r1979.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1120r1979.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1121: Mechanical Failures Prevention Group (MFPG) purpose, objectives, and organization</span><br><span class="publication_date"><label class="label">Date Published: </label>1980</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1121</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1121</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1121.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1121.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1122: AASHTO materials reference laboratory</span><br><span class="publication_date"><label class="label">Date Published: </label>1980</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1122</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1122</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1122.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1122.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1123: energy design economics</span><br><span class="publication_date"><label class="label">Date Published: </label>1980</span><br><span class="authors"><label class="label">Authors: </label>Harold E Marshall, Roasalie T Ruegg, Forrest Wilson</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1123</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1123</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1123.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1123.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1124: bioclimatic chart</span><br><span class="publication_date"><label class="label">Date Published: </label>1980</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1124</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1124</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1124.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1124.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1125: metallurgy division</span><br><span class="publication_date"><label class="label">Date Published: </label>1980</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1125</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1125</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1125.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1125.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1126: National Engineering Laboratory</span><br><span class="publication_date"><label class="label">Date Published: </label>1980</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1126</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1126</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1126.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1126.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1127: software development tools: a reference guide to a taxonomy of tool features</span><br><span class="publication_date"><label class="label">Date Published: </label>1981</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1127</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1127</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1127.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1127.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1128: NBS policy on use of its name in advertising</span><br><span class="publication_date"><label class="label">Date Published: </label>1982</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1128</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1128</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1128.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1128.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 113: fire resistance of clay hollow wall tile</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 113</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.113</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular113.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.113.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1130: condition assessment of buildings</span><br><span class="publication_date"><label class="label">Date Published: </label>1982</span><br><span class="authors"><label class="label">Authors: </label>Porter Driscoll, James Pielert</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1130</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1130</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1130.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1130.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 1132: the metric system of measurements (SI)</span><br><span class="publication_date"><label class="label">Date Published: </label>1982</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 1132</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.1132</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular1132.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.1132.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 113: fire resistance of clay hollow wall tile</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 113r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.113r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular113r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.113r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 114: U.S. petroleum oil table</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 114</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.114</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular114.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.114.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 115: behavior of nickel anodes</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 115</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.115</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular115.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.115.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 116: conversion tables for square feet into square meters, square meters into square feet,
cubic feet into cubic meters, and cubic meters into cubic feet</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 116</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.116</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular116.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.116.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 117: selenium cells</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 117</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.117</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular117.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.117.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 118: publications from the division of metallurgy</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 118</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.118</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular118.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.118.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 118 supplement: metallurgical publications</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 118sup12/1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.118sup12/1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular118sup12.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.118sup12/1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 118 supplement </span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 118sup1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.118sup1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular118sup1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.118sup1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 118 supplement: metallurgical publications</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 118sup1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.118sup1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular118sup1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.118sup1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 118 supplement </span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 118sup3/1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.118sup3/1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular118sup3.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.118sup3/1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 119: Bureau of Standards research associate plan</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 119</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.119</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular119.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.119.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 11 (Communication B461): symbols for screw threat notation and formulas</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 11r1919</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.11r1919</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular11r1919.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.11r1919.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 120: conductivity of nickel solutions</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 120</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.120</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular120.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.120.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 121: publications on electrodeposition from the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 121</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.121</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular121.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.121.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 122: memorandum on specimens for fiber rope</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 122</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.122</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular122.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.122.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 123: kilocycle-meter conversion table</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 123</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.123</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular123.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.123.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 124: recommended specification for powdered ammonia</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 124</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.124</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular124.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.124.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 125: throwing power in copper and nickel deposition</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 125</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.125</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular125.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.125.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 125: throwing power in copper and nickel deposition</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 125r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.125r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular125r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.125r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 127: specifications for tickets for type-registering weigh beams</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 127</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.127</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular127.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.127.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 128: specifications for hand operated grain hopper scales</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 128</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.128</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular128.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.128.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 129: state laws and rules and regulations relating to milk bottles</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 129</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.129</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular129.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.129.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 12 (Communication B466): procedure of tests and explanation of reports of munition and other limit gages</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 12r1919</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.12r1919</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular12r1919.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.12r1919.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 13: inspection of taper thread gages</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 13</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.13</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular13.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.13.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 130: abridged U.S. petroleum oil table</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 130</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.130</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular130.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.130.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 131: publications relating to ceramics</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 131</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.131</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular131.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.131.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 131: publications relating to ceramics</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 131r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.131r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular131r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.131r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 131: publications by the Bureau of Standards relating to ceramics</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 131r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.131r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular131r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.131r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 132: the organization and work of the United States Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 132</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.132</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular132.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.132.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 133: house heating with oil</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 133</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.133</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular133.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.133.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 134: painting of steam and hot water radiators</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 134</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.134</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular134.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.134.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 135: general report of the work of the railroad track scale testing service of the Bureau
of Standards July 1, 1923, to June 30, 1924</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 135</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.135</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular135.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.135.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 136: memorandum regarding preparation of wire rope specimens for tensile strength tests</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 136</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.136</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular136.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.136.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 137: the safety of theatre proscenium curtains</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 137</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.137</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular137.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.137.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 138: publications relating to building materials, construction, and building codes</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 138</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.138</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular138.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.138.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 138: publications relating to building materials, construction, and building codes</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 138r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.138r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular138r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.138r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 138: publications relating to building materials, construction, and building codes</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 138r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.138r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular138r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.138r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 139: report of service tests on concrete floor treatments</span><br><span class="publication_date"><label class="label">Date Published: </label>1920</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 139</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.139</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular139.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.139.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 13 (Communication B507): inspection of taper thread gages</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 13r1919</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.13r1919</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular13r1919.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.13r1919.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 140: blast furnace slag as concrete aggregate</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 140</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.140</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular140.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.140.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 141: inspection of Portland cement</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 141</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.141</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular141.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.141.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 142: the principal requirements of the Portland cement specifications of various countries</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 142</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.142</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular142.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.142.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 143: textiles</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 143</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.143</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular143.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.143.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 143: textiles</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 143r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.143r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular143r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.143r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 143: textiles</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 143r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.143r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular143r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.143r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 144: publications of section VII-7, Bureau of Standards lime</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 144</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.144</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular144.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.144.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 144: publications relating to lime</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 144r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.144r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular144r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.144r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 144: publications relating to lime</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 144r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.144r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular144r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.144r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 144: publications relating to lime</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 144r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.144r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular144r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.144r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 144: publications relating to lime</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 144r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.144r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular144r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.144r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 145: publications of section VII-7, Bureau of Standards gypsum</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 145</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.145</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular145.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.145.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 145: publications relating to gypsum</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 145r11/1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.145r11/1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular145r11.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.145r11/1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 145: publications relating to gypsum</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 145r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.145r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular145r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.145r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 145: publications relating to gypsum</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 145r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.145r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular145r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.145r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 145: publications relating to gypsum</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 145r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.145r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular145r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.145r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 145: publications relating to gypsum</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 145r6/1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.145r6/1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular145r6.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.145r6/1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 146: publications of section VII-7, Bureau of Standards sand-lime brick</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 146</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.146</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular146.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.146.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 146: publications relating to sand-lime brick</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 146r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.146r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular146r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.146r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 146: publications relating to sand-lime brick</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 146r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.146r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular146r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.146r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 146: publications relating to sand-lime brick</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 146r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.146r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular146r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.146r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 146: publications relating to sand-lime brick</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 146r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.146r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular146r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.146r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 147: sources of information and data on the properties of metals and alloys</span><br><span class="publication_date"><label class="label">Date Published: </label>1920</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 147r1920</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.147r1920</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular147r1920.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.147r1920.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 149: welding practice</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 149</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.149</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular149.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.149.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 14 (Communication B510): construction and operation of projection apparatus for measuring screw thread gages
and profiles</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 14r1919</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.14r1919</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular14r1919.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.14r1919.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 15 (Communication B512): interchangeability of U.S. standards and British standard Whitworth threads by diameter
modification</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 15</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.15</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular15.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.15.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 150: dry etching of glass</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 150</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.150</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular150.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.150.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 151: analysis of raw tanning materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 151</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.151</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular151.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.151.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 152: specifications for the manufacture and installation of motor truck, built-in, self-contained,
and portable scales for railroad services</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 152</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.152</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular152.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.152.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 152: specifications for the manufacture and installation of motor truck, built-in, self-contained,
and portable scales for railroad services</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 152r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.152r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular152r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.152r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 153: abridged volume correction table for petroleum oils</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 153</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.153</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular153.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.153.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 154: list of letter circulars</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 154</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.154</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular154.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.154.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 154: supplement to list of letter circulars</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 154r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.154r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular154r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.154r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 155: publications by the Bureau of Standards on cement, concrete, reinforced concrete,
stucco, magnesite, building stone and related subjects</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 155</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.155</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular155.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.155.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 155: publications by the Bureau of Standards on cement, concrete, reinforced concrete,
stucco, magnesite, building stone and related subjects</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 155r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.155r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular155r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.155r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 156: contributions to technical literature on cement, concrete, reinforced concrete, stucco,
magnesite, building stone and related subjects</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 156</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.156</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular156.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.156.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 157: foreign sole leathers</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 157</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.157</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular157.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.157.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 159: abridged volume correction table for petroleum oils</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 159</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.159</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular159.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.159.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 160: abridged volume correction table for petroleum oils</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 160</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.160</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular160.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.160.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 160: abridged volume correction table for petroleum oils</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 160r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.160r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular160r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.160r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 161: waterproofing cotton goods</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 161</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.161</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular161.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.161.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 161: waterproofing cotton goods</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 161r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.161r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular161r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.161r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 162: publications relating to electric batteries</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 162</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.162</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular162.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.162.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 162: publications relating to electric batteries</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 162r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.162r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular162r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.162r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 163: nickel plating on zinc and zinc-base die castings</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 163</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.163</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular163.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.163.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 164: sources of information and data on the properties of metals and alloys</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 164r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.164r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular164r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.164r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 165: publications relating to fire resistance of materials and fire prevention</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 165</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.165</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular165.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.165.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 165: publications relating to fire resistance section</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 165r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.165r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular165r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.165r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 166: publications of the engineering mechanics section</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 166</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.166</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular166.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.166.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 166: publications which, in whole or in part, are the result of work done by the engineering
mechanics section</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 166r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.166r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular166r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.166r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 166: publications of the engineering mechanics section Bureau of Standards, Department
of Commerce, Washington</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 166r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.166r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular166r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.166r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 167: twelve outstanding accomplishments of the Bureau of Standards in 1924</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 167</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.167</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular167.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.167.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 168: addresses of sources of publications issued by the lime, gypsum and sand-lime brick
section</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 168</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.168</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular168.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.168.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 168: addresses of sources of publications issued by the lime, gypsum and sand-lime brick
section</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 168r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.168r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular168r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.168r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 169: miscellaneous publications of the lime, gypsum, and sand-lime brick section</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 169</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.169</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular169.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.169.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 16 (Communication B513): services available at the Bureau of Standards gage laboratory</span><br><span class="publication_date"><label class="label">Date Published: </label>1920</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 16r1920</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.16r1920</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular16r1920.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.16r1920.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 17 (Communication B514): explanation of drawings used in manufacture of pitch testing devices</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 17</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.17</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular17.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.17.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 170: motor lubricating oils</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 170</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.170</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular170.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.170.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 171: requirements, construction and operation of apparatus for measurement of the frequencies
of distant radio transmitting stations</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 171</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.171</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular171.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.171.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 171: requirements, construction and operation of apparatus for measurement of the frequencies
of distant radio transmitting stations</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 171r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.171r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular171r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.171r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 172: the protective value of nickel plating on iron and steel</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 172</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.172</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular172.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.172.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 173: magnetic analysis</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 173</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.173</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular173.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.173.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 174: reclaiming crude rubber</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 174</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.174</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular174.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.174.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 175: note on flask failure in the oxidation test</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 175</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.175</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular175.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.175.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 176: publications relating to leather</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 176</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.176</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular176.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.176.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 177: the application of chromium plating to printing plates</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 177</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.177</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular177.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.177.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 178: publications relating to rubber</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 178</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.178</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular178.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.178.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 179: portable machines for measuring the wheel loads of vehicles</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 179</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.179</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular179.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.179.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 18 (Communication B516): important European screw thread systems and dimensions of bolt and screw heads and
nuts</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 18</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.18</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular18.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.18.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 180: specifications for radio frequency indicator, type B</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 180</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.180</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular180.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.180.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 181: references on the subject of rubber (other than publications of the Bureau of Standards)</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 181</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.181</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular181.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.181.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 182: electrical interference with radio reception</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 182</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.182</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular182.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.182.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 182: electrical interference with radio reception</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 182r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.182r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular182r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.182r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 183: directions for use of the piezo oscillator and auxiliary generator for calibration
of a radio frequency meter</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 183</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.183</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular183.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.183.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 183: directions for use of the piezo oscillator and auxiliary generator for calibration
of a radio frequency meter</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 183r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.183r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular183r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.183r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 184: general report of the work of the railroad track scale testing service of the U.S.
Bureau of Standards during the fiscal year, 1925:July 1, 1924 to June 30, 1925</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 184</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.184</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular184.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.184.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 185: specifications for portable frequency meter for frequencies from 1500 to 15000 kilocycles,
Bureau of Standards type K</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 185</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.185</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular185.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.185.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 185: specifications for portable frequency meter for frequencies from 1500 to 15000 kilocycles,
Bureau of Standards type K</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 185r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.185r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular185r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.185r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 185: specifications for portable frequency meter for frequencies from 1500 to 15000 kilocycles,
Bureau of Standards type K</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 185r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.185r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular185r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.185r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 186: specifications for portable piezo oscillator, Bureau of Standards type N</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 186</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.186</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular186.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.186.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 186: specifications for portable piezo oscillator, Bureau of Standards type N</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 186r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.186r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular186r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.186r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 187: specifications for portable auxiliary generator, Bureau of Standards type O</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 187</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.187</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular187.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.187.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 187: specifications for portable auxiliary generator, Bureau of Standards type O</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 187r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.187r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular187r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.187r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 188: sound proof partitions</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label>PR Heyl</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 188</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.188</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular188.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.188.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 189: fee schedule 203 for tests of metals and metallic structures</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 189</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.189</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular189.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.189.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 18 (Communication B516): important European screw thread systems and dimensions of bolt and screw heads and
nuts</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 18r1923</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.18r1923</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular18r1923.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.18r1923.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 19 (Communication B517): thread form and clearance of thread gages</span><br><span class="publication_date"><label class="label">Date Published: </label>1918</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 19</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.19</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular19.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.19.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 190: altitude-pressure tables based on the United States standard atmosphere</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label>WG Brombacher</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 190</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.190</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular190.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.190.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 191: testing laboratories equipped for mechanical tests of metals and other engineering
materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 191</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.191</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular191.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.191.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 191: list of materials testing laboratories</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 191r1929</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.191r1929</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular191r1929.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.191r1929.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 192: corrosion resistance of iron and steel</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 192</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.192</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular192.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.192.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 193: influence of sheeting upon the heat-retailing properties of blankets</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 193</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.193</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular193.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.193.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 194: list of scientific publications of the laboratory for special radio transmission research,
formerly the U.S. Naval radio research laboratory</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label>LW Austin</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 194</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.194</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular194.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.194.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 195:testing laboratories equipped for metallurgical tests </span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 195</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.195</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular195.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.195.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 196: testing laboratories equipped for chemical analysis</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 196</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.196</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular196.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.196.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 197: work shops of science</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 197</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.197</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular197.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.197.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 198: some outstanding accomplishments of the Bureau of Standards in 1925</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 198</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.198</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular198.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.198.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 199: selenium cells; photoelectric cells; thermopiles</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 199</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.199</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular199.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.199.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 199: selenium cells; photoelectric cells; thermopiles</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 199r1930</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.199r1930</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular199r1930.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.199r1930.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 2: leather, paper, rubber, and textiles</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 2</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.2</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular2.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.2.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 20 (Communication B519): the measurement of radii on profile gages</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 20</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.20</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular20.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.20.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 200: measurement of crankcase dilution, capillary funnel method</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 200</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.200</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular200.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.200.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 201: suggestions for a trip through the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 201</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.201</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular201.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.201.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 202: fees for electrical testing</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 202</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.202</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular202.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.202.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 203: fees for photometric testing</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 203</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.203</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular203.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.203.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 204: metals do not crystallize under vibration</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 204</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.204</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular204.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.204.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 205: sound proof partitions</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label>PR Heyl</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 205</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.205</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular205.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.205.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 206: general report of the U.S. Bureau of Standards investigation of car load freight weighing
facilities during the fiscal year 1926, ending June 30, 1926</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 206</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.206</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular206.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.206.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 207: bibliography on radio wave phenomena and measurement of radio field intensities</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 207</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.207</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular207.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.207.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 208: zinc plating from acid baths</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 208</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.208</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular208.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.208.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 209: general policy of the Bureau of Standards with regard to testing</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 209</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.209</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular209.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.209.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 21 (Communication B521): the micrometer microscope and its uses in gage inspection</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 21</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.21</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular21.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.21.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 210: acoustics of motor car bodies</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label>PR Heyl</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 210</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.210</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular210.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.210.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 211: the application of chromium plating to gates</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 211</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.211</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular211.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.211.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 212: publications of the bituminous laboratory</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 212</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.212</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular212.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.212.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 213: testing clay hollow tile</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 213</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.213</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular213.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.213.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 214: requirements of constant frequency stations</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 214</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.214</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular214.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.214.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 215: thermal expansion of solids</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 215</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.215</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular215.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.215.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 216: facts about the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 216</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.216</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular216.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.216.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 217: colorimetry at the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 217</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.217</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular217.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.217.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 218: new fees and new tests for standard weights</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 218</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.218</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular218.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.218.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 219: tests of magnetic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 219</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.219</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular219.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.219.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 22 (Communication B522): the measurement of taper gages</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 22</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.22</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular22.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.22.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 220: incandescent electric lamps as photometric standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 220</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.220</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular220.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.220.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 221: tests of resistance apparatus</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 221</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.221</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular221.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.221.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 222: testing of electrical instruments, meters, and instrument transformers</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 222</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.222</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular222.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.222.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 223: use of the piezo oscillator in radio broadcasting stations</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 223</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.223</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular223.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.223.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 224: formulas and tables for the calculation of antenna capacity</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 224</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.224</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular224.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.224.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 225: some outstanding accomplishments of the Bureau of Standards in 1926</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 225</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.225</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular225.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.225.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 226: the design of an exponential acoustic horn</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 226</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.226</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular226.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.226.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 227: thermal insulation</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 227</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.227</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular227.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.227.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 228: the fire resistance of brick walls bricks made of clay or shale</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 228</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.228</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular228.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.228.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 229: the fire resistance of brick walls made of concrete or sand-lime bricks</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 229</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.229</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular229.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.229.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 23 (Communication B523): measurement of pitch diameter of screw thread gages</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 23</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.23</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular23.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.23.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 230: glycerin or ethylene glycol in foundry sand mold facing mixtures</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 230</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.230</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular230.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.230.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 232: the determination of sulphur in petroleum oils</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 232</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.232</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular232.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.232.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 233: publications relating to electrical measuring instruments, meters and their accessories</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 233</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.233</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular233.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.233.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 234: testing laboratories equipped for thermal expansion tests of solids</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 234</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.234</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular234.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.234.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 235: the ultraviolet spectral transmission of various new glasses and window glass substitutes,
used in therapy</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 235</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.235</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular235.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.235.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 235: the ultraviolet spectral transmission of various new glasses and window glass substitutes,
used in therapy</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 235r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.235r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular235r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.235r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 235: the ultra-violet transmission of various new glasses and window glass substitutes
as compared with that of common window glass</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 235r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.235r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular235r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.235r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 236: readjusting screw-knob weights class s</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 236</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.236</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular236.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.236.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 237: railroad track scale testing service of the U.S. Bureau of Standards during the fiscal
year July 1, 1926 to June 30, 1927</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 237</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.237</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular237.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.237.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 238: Martens' extensometer with Tuckerman optical lever system for high temperature tension
tests</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 238</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.238</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular238.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.238.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 239: list of publications giving data on dental research</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 239</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.239</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular239.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.239.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 23: measurement of pitch diameter of screw thread gages</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 23r1923</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.23r1923</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular23r1923.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.23r1923.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 24: standard thickness of sheet metal</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 24</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.24</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular24.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.24.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 240: specifications for hemocytometer chambers</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 240</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.240</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular240.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.240.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 241: effect of sulphur and phosphorus on iron and steel</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 241r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.241r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular241r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.241r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 242: anti-dimming preparations for glass surfaces</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 242</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.242</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular242.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.242.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 243: weights and measures publications</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 243</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.243</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular243.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.243.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 244: use of the piezo oscillator in radio broadcasting stations</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 244</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.244</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular244.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.244.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 245: proposed final draft for safety code for brakes and brake testing</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 245</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.245</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular245.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.245.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 246: specifications for portable piezo oscillator, Bureau of Standards, type N</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 246</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.246</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular246.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.246.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 247: detergents (soaps, polishes, etc.)</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 247</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.247</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular247.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.247.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 248: sintering test of molding sand</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 248</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.248</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular248.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.248.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 249: materials for filling etched lines on thermometers</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 249</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.249</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular249.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.249.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 24: standard thickness of sheet metal</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 24r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.24r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular24r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.24r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 250: specification for proving rings for calibrating testing machines</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 250</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.250</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular250.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.250.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 251: having standard weights tested by the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 251</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.251</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular251.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.251.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 252: rubber binders for foundry cores</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 252</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.252</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular252.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.252.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 253: corrosion resistance of bare and zinc-coated iron and steel</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 253</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.253</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular253.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.253.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 254: the treatment of water for boiler use</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 254</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.254</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular254.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.254.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 255: electric and gas refrigerators</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 255</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.255</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular255.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.255.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 256: sources of supply of commodities covered by United States government specifications</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 256</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.256</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular256.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.256.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 256A: sources of supply of commodities covered by federal specifications</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 256Ar1930</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.256Ar1930</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular256Ar1930.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.256Ar1930.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 257: sources of information on the properties of metals and alloys (books)</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 257</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.257</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular257.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.257.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 258: testing of piezo oscillators for broadcasting stations</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 258</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.258</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular258.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.258.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 259: railroad track scale testing service of the U.S. Bureau of Standards during the fiscal
year July 1, 1927 to June 30, 1928</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 259</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.259</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular259.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.259.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 26: celluloid</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 26</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.26</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular26.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.26.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 260: soundproofing of airplane cabins</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 260</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.260</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular260.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.260.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 261: application of the National Electric Safety Code</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 261</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.261</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular261.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.261.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 262: tentative specification for traffic white paint (semipaste and ready-mixed)</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 262</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.262</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular262.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.262.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 263: painting of steam and hot water radiators</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 263r1929</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.263r1929</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular263r1929.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.263r1929.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 264: specifications for proving rings for calibrating testing machines</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 264</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.264</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular264.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.264.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 265: sundials</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 265</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.265</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular265.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.265.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 266: specifications for portable testing machine for making transverse tests of building
bricks</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 266</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.266</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular266.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.266.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 267: pneumatic tire equipment</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 267</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.267</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular267.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.267.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 268: nomenclature of the alloys brass, bronze and so-called government bronze</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 268</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.268</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular268.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.268.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 269: selected bibliography on neon and its uses in sign lighting, aviation, and miscellaneous
applications</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 269</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.269</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular269.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.269.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 27: twelve examples of work accomplished by the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 27</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.27</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular27.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.27.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 270: rubber floor tile</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 270</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.270</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular270.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.270.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 271: publications relating to friction and lubrication</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 271</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.271</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular271.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.271.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 272: publication of the polarimetry section Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 272</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.272</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular272.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.272.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 273: papers on colorimetry from the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 273r1929</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.273r1929</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular273r1929.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.273r1929.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 274:sources of radio information </span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 274</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.274</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular274.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.274.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 275: polishes</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 275</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.275</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular275.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.275.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 276: railroad track scale testing service of the U.S. Bureau of Standards during the fiscal
year July 1, 1928 to June 30, 1929</span><br><span class="publication_date"><label class="label">Date Published: </label>1929</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 276</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.276</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular276.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.276.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 277: sources of supply of commodities covered by commercial standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 277</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.277</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular277.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.277.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 278: sound absorption coefficients for some of the more common materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 278</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.278</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular278.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.278.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 279: use of the piezo oscillator in radio broadcasting stations</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 279</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.279</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular279.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.279.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 28: preliminary report on anti-freezing solutions for automobile radiators</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 28</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.28</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular28.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.28.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 280: measurement of the frequency of distant radio transmitting stations (replacing Letter
Circular 171)</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 280</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.280</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular280.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.280.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 281: good gasoline</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 281</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.281</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular281.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.281.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 282: thermal insulation</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 282</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.282</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular282.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.282.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 283: publications of the department of commerce Bureau of Standards optical instruments
section dealing with optical instruments, refractometry and optical glass</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 283</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.283</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular283.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.283.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 284: list of publications and articles relating to home heating problem</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 284</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.284</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular284.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.284.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 285: aeronautical publications by members of the staff of the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 285</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.285</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular285.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.285.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 286: solid carbon dioxide</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 286</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.286</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular286.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.286.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 287: list of published material relating to home building and maintenance</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 287</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.287</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular287.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.287.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 288: painting plaster</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 288</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.288</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular288.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.288.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 289: a convenient mixture for testing the operating efficiency of a distilling column (A.P.I.
project 6)</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 289</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.289</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular289.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.289.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 28: anti-freezing solutions for automobile radiators</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 28r1924</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.28r1924</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular28r1924.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.28r1924.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 28: anti-freezing solutions for automobile radiators</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 28r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.28r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular28r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.28r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 29: the ideal wall construction</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 29</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.29</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular29.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.29.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 290: publications of the Bureau of Standards relating to building materials, home building,
home ownership, city planning, and zoning</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 290</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.290</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular290.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.290.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 291: Bureau of Standards publications on paint, varnish, and bituminous materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 291</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.291</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular291.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.291.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 292: liquefied petroleum (bottled) gases</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 292</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.292</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular292.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.292.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 293: sound absorption coefficients of the more common materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 293</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.293</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular293.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.293.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 294: specifications for proving rings for calibrating testing machines</span><br><span class="publication_date"><label class="label">Date Published: </label>1930</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 294</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.294</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular294.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.294.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 295: railroad track scale testing service of the National Bureau of Standards fiscal year
July 1, 1929 to June 30, 1930</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 295</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.295</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular295.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.295.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 296: tests of magnetic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 296</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.296</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular296.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.296.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 297: electric and gas refrigerators (replaces Letter Circular 255)</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 297</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.297</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular297.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.297.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 298: automobile engine lubricating oils</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 298</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.298</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular298.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.298.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 299: design of gas burners or domestic use</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 299</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.299</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular299.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.299.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 2: leather, paper, rubber, and textiles</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 2r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.2r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular2r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.2r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 3: reclamation of used lubricating oils</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 3</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.3</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular3.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.3.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 30: information on refrigeration</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 30</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.30</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular30.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.30.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 300: aquarium cement</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 300</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.300</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular300.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.300.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 301: traffic paint</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 301</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.301</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular301.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.301.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 302: battery compounds and solutions</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 302</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.302</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular302.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.302.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 303: sound absorption coefficients of the more common materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 303</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.303</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular303.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.303.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 304: painting plaster</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 304</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.304</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular304.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.304.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 305:a guide to the literature on rubber </span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 305</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.305</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular305.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.305.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 306: building code and plumbing code tabulation</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 306</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.306</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular306.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.306.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 307: specifications for haemacytometer chambers (superseding Letter Circular 240)</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 307</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.307</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular307.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.307.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 308: sound absorption coefficients of the more common materials (superseding Letter Circular
303)</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 308</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.308</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular308.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.308.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 309: specifications for the repair of scales of large capacity</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 309</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.309</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular309.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.309.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 30: information on refrigeration</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 30r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.30r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular30r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.30r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 31: publications relating to heat</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 31</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.31</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular31.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.31.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 310: specifications, standardization, and the use of steel tapes</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 310</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.310</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular310.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.310.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 311: the development of standard sieve specifications in the United States</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 311</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.311</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular311.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.311.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 312: supplementary tests of gypsum as fire protection for building columns</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 312</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.312</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular312.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.312.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 313: monographic chart for use with steel measuring tapes</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 313</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.313</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular313.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.313.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 314: use of standard frequency transmissions in checking standard oscillators (replacing
Letter Circulars 171 & 280)</span><br><span class="publication_date"><label class="label">Date Published: </label>1931</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 314</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.314</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular314.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.314.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 315: railroad track scale testing service of the National Bureau of Standards fiscal year
July 1, 1930 to June 30, 1931</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 315</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.315</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular315.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.315.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 316: publications of the engineering mechanics section Bureau of Standards, Department
of Commerce, Washington (revision of Letter Circular 166)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 316</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.316</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular316.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.316.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 317: distance ranges of radio waves</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 317</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.317</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular317.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.317.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 318: practical modernizing of homes benefits the family and increases property values</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 318</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.318</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular318.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.318.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 319: publications relating to photography</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 319</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.319</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular319.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.319.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 32: methods of silvering glass</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 32</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.32</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular32.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.32.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 320: automobile engine lubricating oils (supersedes Letter Circular 298)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 320r1932</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.320r1932</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular320r1932.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.320r1932.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 321: rubber latex</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 321</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.321</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular321.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.321.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 322: list of publications of interest to household purchasers</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 322</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.322</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular322.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.322.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 323: standards and specifications for building materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 323</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.323</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular323.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.323.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 324: brake testing devices (superseding Letter Circular 245)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 324r1932</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.324r1932</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular324r1932.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.324r1932.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 325: aeronautical publications by members of the staff of the Bureau of Standards (superseding
Letter Circular 285)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 325</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.325</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular325.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.325.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 326: sound absorption coefficients of the more common materials (superseding Letter Circular
308)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 326</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.326</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular326.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.326.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 327: cellophane</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 327</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.327</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular327.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.327.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 328: soil corrosion of underground piping systems</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 328</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.328</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular328.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.328.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 329: determination of the corrosively of soils</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 329</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.329</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular329.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.329.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 32: methods of silvering glass</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 32r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.32r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular32r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.32r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 32: methods of silvering glass, supplement</span><br><span class="publication_date"><label class="label">Date Published: </label>1919</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 32sup</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.32sup</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular32sup.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.32sup.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 33: the structure and properties of alternately electrodeposited metals</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 33</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.33</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular33.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.33.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 330: protective coatings for underground piping systems</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 330</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.330</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular330.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.330.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 331: inks (superseding Letter Circular 95)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 331</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.331</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular331.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.331.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 332: publications relating to photography</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 332</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.332</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular332.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.332.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 333: outside house painting</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 333</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.333</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular333.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.333.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 334: spray painting</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 334</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.334</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular334.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.334.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 335: uses of transmissions of standard radio frequencies (replacing Letter Circular 171,
280, & 314)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 335</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.335</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular335.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.335.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 336: luminous paints</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 336</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.336</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular336.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.336.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 337: painting water tanks</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 337</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.337</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular337.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.337.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 338: detergents and certain detergent aids</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 338</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.338</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular338.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.338.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 339: floor oils</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 339</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.339</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular339.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.339.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 34: lead plating form fluoborate solutions</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 34</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.34</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular34.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.34.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 340: sweeping compounds (also known as floor sweep and dust down)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 340</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.340</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular340.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.340.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 341: drainpipe cleaners or solvents</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 341</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.341</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular341.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.341.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 342: testing of electrical instruments, meters, and instrument transformers (revision of
Letter Circular 222)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 342r1932</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.342r1932</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular342r1932.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.342r1932.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 343: solders and soldering</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 343</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.343</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular343.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.343.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 344: sound absorption coefficients of the more common materials (superseding Letter Circular
326)</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 344</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.344</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular344.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.344.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 345: index of simplified practice recommendations</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 345</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.345</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular345.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.345.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 346: list of simplified practice recommendations proposed, approved and accepted by industrial
groups, under the auspices of the Bureau of Standards, U. S. Department of Commerce</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 346</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.346</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular346.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.346.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 347: sundials</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label>RE Gould</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 347</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.347</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular347.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.347.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 348: publications and mailing matter of the division of building and housing</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 348</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.348</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular348.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.348.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 349: modifications in recommended building code requirements for working stresses in building
materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 349</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.349</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular349.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.349.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 35: publications relating to petroleum products</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 35</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.35</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular35.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.35.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 350: publications on glass technology and standard samples of interest to the glass industry</span><br><span class="publication_date"><label class="label">Date Published: </label>1932</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 350</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.350</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular350.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.350.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 351: color and legibility</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 351</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.351</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular351.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.351.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 352: color of illuminant and efficiency of the worker</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 352</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.352</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular352.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.352.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 353: railroad track scale testing service of the National Bureau of Standards fiscal year
July 1, 1931 to June 30, 1932</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 353</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.353</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular353.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.353.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 354: list of available commercial standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 354r1933</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.354r1933</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular354r1933.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.354r1933.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 355: key to minimum requirements recommended by the Department of Commerce Building Code
Committee</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 355</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.355</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular355.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.355.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 356: color harmony</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 356</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.356</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular356.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.356.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 357: real estate appraisal practices</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 357</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.357</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular357.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.357.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 358: color charts</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 358</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.358</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular358.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.358.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 359: sound absorption coefficients of the more common materials (superseding Letter Circular
344)</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 359</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.359</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular359.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.359.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 35: publications relating to petroleum products</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 35r1924</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.35r1924</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular35r1924.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.35r1924.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 36: public utilities</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 36</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.36</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular36.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.36.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 360: rerefining used crankcase oil</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 360</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.360</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular360.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.360.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 361: typical home modernizing and community improvement campaigns</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 361</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.361</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular361.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.361.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 362: comparisons of residential vacancy survey reports in 46 towns and cities</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 362</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.362</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular362.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.362.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 363: the properties and testing of foundry sands</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 363</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.363</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular363.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.363.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 364: publications relating to electrical measuring instruments, meters and their accessories
(superseding Letter Circular 233)</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 364</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.364</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular364.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.364.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 365: summary of estimated expenditures for labor and materials reported by local modernizing
campaign committees from Jan. 1, 1932 to April 1, 1933</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 365</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.365</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular365.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.365.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 366: bringing homes up to date through community home improvement campaigns in rural districts
and smaller towns</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 366</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.366</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular366.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.366.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 367: tabulation of reports from cities conducting home modernizing campaigns in 1932</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 367</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.367</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular367.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.367.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 368: routine testing of lubricants and liquid fuels</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 368</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.368</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular368.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.368.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 369: survey of city planning and related laws in 1932</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label>Lester G Chase</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 369</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.369</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular369.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.369.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 37: clay products</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 37</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.37</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular37.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.37.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 370: regional planning commissions or organizations in the United States</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label>Lester G Chase</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 370</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.370</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular370.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.370.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 371: city planning commissions in the United States</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label>Lester G Chase</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 371</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.371</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular371.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.371.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 372: the use of flexible steel gages in gaging the mesh of gill nets</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 372</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.372</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular372.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.372.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 373: list of pamphlets dealing with community home improvement and repair work activities,
and other material of inters to home owners</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 373r1933</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.373r1933</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular373r1933.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.373r1933.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 374: zoned municipalities in the United States</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label>Normal L Knauss</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 374</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.374</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular374.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.374.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 375: survey of zoning laws and ordinances adopted during 1932</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label>Normal L Knauss</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 375</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.375</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular375.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.375.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 376: metric and English distance equivalents for athletic events (track and field)</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 376</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.376</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular376.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.376.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 377: status of municipal building codes</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 377</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.377</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular377.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.377.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 378a: zoned municipalities -- by population groups; municipalities having over 100,000 population</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 378a</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.378a</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular378a.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.378a.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 378b: zoned municipalities -- by population groups; municipalities of more than 40,000 and
less than 100,000 population</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 378b</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.378b</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular378b.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.378b.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 378c: zoned municipalities -- by population groups; municipalities of more than 20,00 and
less than 40,000 population</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 378c</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.378c</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular378c.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.378c.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 378d: zoned municipalities -- by population groups; municipalities of more than 10,000 and
less than 20,000 population</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 378d</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.378d</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular378d.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.378d.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 378e: zoned municipalities -- by population groups; municipalities of more than 5,000 and
less than 10,000 population</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 378e</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.378e</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular378e.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.378e.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 378f: zone municipalities -- by population groups; municipalities of more than 3,000 and
less than 5,000 population</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 378f</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.378f</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular378f.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.378f.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 378g: municipalities -- by population groups; municipalities of more than 1,000 and less
than 3,000 population</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 378g</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.378g</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular378g.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.378g.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 378h: municipalities -- by population groups; municipalities having less than 1,000 population</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 378h</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.378h</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular378h.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.378h.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 379: operating manual for conducting a local modernizing campaign</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 379</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.379</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular379.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.379.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 38: reports and papers relative to the investigation of automotive power plants, Bureau
of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 38</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.38</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular38.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.38.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 380: acoustical publications by members of the staff of the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 380</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.380</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular380.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.380.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 381: suggested information on reconditioning home interiors - furniture and built-in equipment</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 381</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.381</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular381.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.381.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 382: comparisons of residential vacancy survey reports in 51 towns and cities</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 382</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.382</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular382.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.382.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 383: practical reasons for modernizing old homes</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 383</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.383</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular383.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.383.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 384: publications relating to electric batteries (superseding Letter Circular 162)</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 384</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.384</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular384.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.384.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 386: suggested specification for cold water paint, casein type</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 386</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.386</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular386.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.386.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 387: graphited lubricants</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 387</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.387</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular387.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.387.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 388: the care of floors</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 388</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.388</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular388.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.388.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 389: publications of the Bureau of Standards on X-rays</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 389</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.389</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular389.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.389.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 38: reports and papers relative to the investigation of automotive power plants, Bureau
of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 38r1924</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.38r1924</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular38r1924.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.38r1924.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 39: list of sources of elementary radio information</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 39</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.39</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular39.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.39.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 390: list of weights and measures offices of the States and District of Columbia</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 390</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.390</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular390.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.390.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 391: damp masonry walls above grade</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 391</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.391</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular391.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.391.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 392: publications relating to dyes</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 392</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.392</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular392.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.392.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 393: procedure for the measurement of the reflectance of manila rope fiber for light of
wave length 500 millimicrons</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label>Genevieve Becker</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 393</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.393</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular393.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.393.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 394: electrical interference with radio reception (replaces Letter Circular 182)</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 394</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.394</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular394.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.394.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 395: preparation and colorimetric properties of a magnesium-oxide reflectance standard</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 395</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.395</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular395.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.395.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 396: publications relating to textiles (superseding Letter Circular 143)</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 396</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.396</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular396.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.396.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 397: Can I save gas with a gas-saver?</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 397</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.397</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular397.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.397.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 398: publications on colorimetry and spectrophotometry from the National Bureau of Standards
(superseding Letter Circular 273)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 398</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.398</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular398.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.398.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 399: weights and measures publications of general interest (replaces Letter Circular 243)</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 399</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.399</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular399.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.399.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 4: the electrodeposition of lead-tin alloys</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 4</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.4</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular4.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.4.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 40: radio publications of the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 40</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.40</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular40.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.40.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 400: sources of radio information (replaces Letter Circular 274)</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 400</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.400</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular400.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.400.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 401: railway track scale testing service of the National Bureau of Standards fiscal year
July 1, 1932 to June 30, 1933</span><br><span class="publication_date"><label class="label">Date Published: </label>1933</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 401</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.401</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular401.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.401.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 402: cellophane</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 402</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.402</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular402.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.402.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 403: detergents and related subjects</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 403</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.403</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular403.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.403.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 404: methods of using standard-frequency radio transmissions (replaces Letter Circular
335)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 404</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.404</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular404.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.404.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 405: testing machines for determining the strength and other properties of engineering
materials in the laboratories of the National Bureau of Standards, Department of Commerce,
Washington, D.C.</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 405</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.405</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular405.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.405.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 406: theatre safety curtains (replaces Letter Circular 137)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 406</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.406</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular406.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.406.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 407: automobile engine lubricating oils (supersedes Letter Circular 320)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 407r1934</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.407r1934</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular407r1934.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.407r1934.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 408: automobile engine graphited lubricants (supersedes Letter Circular 387)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 408r1934</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.408r1934</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular408r1934.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.408r1934.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 409: specification for proving rings for calibrating testing machines (superseding Letter
Circular 294)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 409</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.409</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular409.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.409.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 40: radio publications of the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 40r1922</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.40r1922</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular40r1922.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.40r1922.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 40: radio publications of the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 40r1923</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.40r1923</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular40r1923.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.40r1923.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 40: radio publications of the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 40r1924</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.40r1924</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular40r1924.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.40r1924.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 40: radio publications of the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 40r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.40r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular40r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.40r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 40: radio publications of the Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1928</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 40r1928</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.40r1928</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular40r1928.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.40r1928.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 41: extension of the Dewey Decimal classification applied to radio</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 41</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.41</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular41.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.41.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 410: simplified practice, its purpose and application</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 410</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.410</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular410.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.410.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 411: rubber cements</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 411</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.411</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular411.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.411.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 412: domestic electric and gas refrigerators (replaces Letter Circular 297)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 412</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.412</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular412.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.412.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 413: aquarium cement</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 413</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.413</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular413.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.413.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 414: anti-dimming preparations for glass surfaces (replacing Letter Circular 242)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 414</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.414</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular414.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.414.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 415: electrical interference with radio reception (replaces Letter Circular 182 and 394)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 415</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.415</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular415.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.415.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 416: list of publications of interest to household purchases</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 416</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.416</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular416.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.416.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 417: publications on thermal expansion</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 417</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.417</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular417.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.417.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 418: standards for checking opacity meters</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 418</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.418</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular418.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.418.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 419: information on refrigeration (replaces Letter Circular 30)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 419</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.419</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular419.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.419.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 420: solid carbon dioxide</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 420r1934</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.420r1934</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular420r1934.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.420r1934.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 421: thermal insulation</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 421</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.421</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular421.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.421.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 422: the painting of structural metal (steel, galvanized metal, tin plate and copper)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label>Percy H Walker, EF Hickson</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 422</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.422</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular422.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.422.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 423: matches</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 423</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.423</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular423.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.423.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 424: carbon paper and typewriter ribbons</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 424</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.424</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular424.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.424.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 425: sound absorption coefficients of the more common materials (superseding Letter Circular
359)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 425</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.425</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular425.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.425.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 426: publications on the platinum metals</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 426</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.426</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular426.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.426.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 427: losses of gasoline in storage and handling</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 427</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.427</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular427.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.427.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 428: house plan services</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 428</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.428</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular428.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.428.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 429: information on ultraviolet transparency of window materials and fabrics (supersedes
Letter Circular 235 and Form Letter PC 113)</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 429</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.429</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular429.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.429.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 43: construction and operation of a very simple radio receiving equipment</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 43</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.43</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular43.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.43.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 430: magnetic insulators</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 430</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.430</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular430.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.430.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 431: railway track scale testing service of the National Bureau of Standards fiscal year
July 1, 1933 to June 30, 1934</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 431</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.431</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular431.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.431.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 432: publications relating to building codes and construction practices, home building
and maintenance -- home ownership</span><br><span class="publication_date"><label class="label">Date Published: </label>1934</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 432</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.432</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular432.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.432.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 433: the corrosively of soils</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 433</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.433</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular433.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.433.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 434: boil corrosion surveys</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 434</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.434</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular434.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.434.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 435: protective coatings for underground piping systems</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 435</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.435</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular435.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.435.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 436: treatments for silk stockings</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 436</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.436</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular436.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.436.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 437: methods of using standard frequency radio emissions (replaces Letter Circular 404)</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 437</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.437</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular437.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.437.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 438: sources of radio information (replaces Letter Circular 400)</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 438</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.438</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular438.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.438.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 439: publications on gages (dimensional)</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 439</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.439</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular439.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.439.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 44: construction and operation of a two-circuit radio receiving equipment with crystal
detector</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 44</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.44</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular44.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.44.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 440: testing laboratories equipped for metallurgical tests</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 440r1935</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.440r1935</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular440r1935.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.440r1935.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 441: fire resistance of safes with cast-iron door frames and jambs</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 441</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.441</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular441.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.441.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 442: books on watchmaking and timepieces</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 442</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.442</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular442.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.442.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 443: status of municipal plumbing codes</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 443r1935</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.443r1935</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular443r1935.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.443r1935.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 444: hardened copper (revision of Letter Circular 61 issued April 26, 1922, and revised
March 19, 1927)</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 444r1935</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.444r1935</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular444r1935.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.444r1935.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 445: painting of steam and hot water radiators</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 445</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.445</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular445.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.445.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 446: automobile engine oil filters</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 446</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.446</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular446.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.446.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 447: publications on paper and paper research by the staff of the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 447</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.447</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular447.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.447.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 448: publications on radiometry from the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 448</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.448</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular448.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.448.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 449: standards of length, mass, and time</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 449</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.449</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular449.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.449.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 45: construction and operation of a simple radiotelegraphic code practice set</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 45</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.45</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular45.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.45.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 450: railway track scale testing service of the National Bureau of Standards fiscal year
1935 (July 1, 1934 to June 30, 1935)</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 450</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.450</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular450.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.450.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 451: publications on fiber structure and industrial utilization of waste land products</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 451</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.451</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular451.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.451.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 452: sound absorption coefficients of the more common materials (superseding Letter Circular
425)</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 452</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.452</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular452.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.452.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 453: methods of using standard-frequency radio emissions (replaces Letter Circular 437)</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 453</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.453</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular453.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.453.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 454: hues of the spectrum colors</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 454</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.454</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular454.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.454.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 455: transparent wrapping materials (replaces Letter Circular 402)</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 455</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.455</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular455.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.455.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 456: simplified practice, its purpose and application</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 456</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.456</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular456.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.456.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 457: quality of linseed oil for government use</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 457</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.457</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular457.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.457.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 458: publications relating to building regulation</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 458</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.458</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular458.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.458.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 459: publications covering NBS work on spark plugs</span><br><span class="publication_date"><label class="label">Date Published: </label>1935</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 459</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.459</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular459.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.459.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 46: Description of fixed condensers used with simple handmade radio receiving sets</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 46</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.46</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular46.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.46.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 460: tests of resistance apparatus (superseding Letter Circular 221)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 460</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.460</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular460.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.460.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 461: permanent magnet steel</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 461</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.461</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular461.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.461.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 462: sun lamps, health lamps; carbon and mercury arc lamps</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 462</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.462</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular462.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.462.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 463: standard thread for tripods of surveying instruments</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 463</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.463</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular463.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.463.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 464: wood and shingle stains (superseding Letter Circular 64)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 464</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.464</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular464.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.464.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 465: aluminum foil insulation</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 465</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.465</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular465.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.465.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 466: procedure for testing women's full-fashioned silk hosiery with the National Bureau
of Standards hosiery testing machine</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 466</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.466</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular466.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.466.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 467: flameproofing of textiles</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 467</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.467</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular467.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.467.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 468: decision of the Supreme Court of the United States and its effect on establishment
of commercial standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 468</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.468</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular468.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.468.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 469: publications on temperature measurements</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 469</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.469</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular469.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.469.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 470: the reflectance of paints and pigments</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 470</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.470</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular470.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.470.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 471: thermal insulation (replaces Letter Circular 421)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 471</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.471</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular471.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.471.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 472: domestic electric and gas refrigerators (replaces Letter Circular 412)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 472</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.472</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular472.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.472.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 473: photoelectric colorimeters</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 473</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.473</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular473.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.473.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 474: sources of radio information (replaces Letter Circular 438)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 474r1936</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.474r1936</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular474r1936.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.474r1936.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 475: testing of electrical instruments, meters, and instrument transformers (revision of
Letter Circular 222 and 342)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 475r1936</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.475r1936</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular475r1936.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.475r1936.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 476: bibliography on spark plugs</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 476</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.476</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular476.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.476.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 477: sound absorption coefficients of the more common acoustic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 477</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.477</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular477.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.477.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 478: list of published material relating to paint, painting, varnish, lacquer, bitumen's
and allied subjects</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 478</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.478</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular478.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.478.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 479: sources of information on the properties of metals and alloys (books) (superseding
Letter Circular 257)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 479</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.479</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular479.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.479.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 48: description and operation of an electron tune detector unity</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 48</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.48</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular48.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.48.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 480: tests for non-metallic protective coatings for underground pipes</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 480</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.480</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular480.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.480.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 481: color charts (superseding Letter Circular 358)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 481</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.481</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular481.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.481.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 482: railway track scale testing service of the National Bureau of Standards fiscal year
1936 (July 1, 1935 to June 30, 1936)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 482</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.482</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular482.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.482.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 483: classification of acoustic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 483</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.483</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular483.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.483.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 484: performance test of floor covering materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 484</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.484</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular484.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.484.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 485: optical instruments, refractometry, and optical glass: publications (including those
in non-governmental periodicals) (superseding Letter Circular 283)</span><br><span class="publication_date"><label class="label">Date Published: </label>1936</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 485</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.485</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular485.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.485.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 486: metals do not crystallize under vibration (replaces Letter Circular 204)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 486</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.486</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular486.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.486.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 487: nomenclature of copper alloys - brass and bronze (replaces Letter Circular 268)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 487</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.487</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular487.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.487.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 488: air conditioning</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 488</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.488</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular488.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.488.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 489: inside wall paint for chemical laboratories (heat- and fume-resisting enamel paint)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 489</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.489</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular489.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.489.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 49: description and operation of an audio-frequency amplifier unit for simple radio receiving
outfits</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 49</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.49</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular49.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.49.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 490: the availability to the public of the research and testing facilities of the National
Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 490</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.490</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular490.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.490.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 491: electrical interference with radio reception (replaces Letter Circular 415)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 491</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.491</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular491.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.491.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 492: weights and measures publications of general interest (supersedes Letter Circular
399)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 492</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.492</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular492.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.492.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 493: sodders and soldering (supersedes Letter Circular 343)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 493</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.493</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular493.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.493.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 494: cement:technical publications by members of the staff of the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 494r1937</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.494r1937</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular494r1937.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.494r1937.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 495: concrete and reinforced concrete :technical publications by members of the staff of
the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 495r1937</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.495r1937</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular495r1937.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.495r1937.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 496: structural clay products, stone, and masonry: technical publications by members of
the staff of the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 496r1937</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.496r1937</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular496r1937.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.496r1937.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 497: services of the National Bureau of Standards to governmental purchasing agencies</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 497</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.497</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular497.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.497.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 498: methods of using standard-frequency radio emissions (replaces Letter Circular 453)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 498</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.498</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular498.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.498.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 499: the weekly radio broadcasts of the National Bureau of Standards on the ionosphere
and radio transmission conditions</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 499</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.499</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular499.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.499.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 5: liquid conversion table giving the equivalent number of barrels of 42 gallons each
corresponding to a specified number of gallons</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 5</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.5</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular5.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.5.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 500: the National Bureau of Standards and the establishment of hard refined dextrose and
laevulose industries</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label>Frederick Bates</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 500</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.500</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular500.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.500.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 501: a guide to the literature on rubber</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 501</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.501</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular501.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.501.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502: research program on building materials and structures, 1937-38</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502A: structural properties of low-cost house construction</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502A</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502A</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502A.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502A.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502B: the durability of building papers and fiberboards relative to low-cost housing</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502B</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502B</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502B.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502B.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502C: fire resistance tests of low-cost housing constructions</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502C</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502C</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502C.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502C.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502D: rain penetration in walls, waterproofing of masonry walls and the properties of joints
in masonry in relation to low-cost housing</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502D</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502D</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502D.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502D.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502E: plumbing materials and equipment as related to low-cost housing</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502E</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502E</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502E.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502E.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502F: investigation or low-cost floor coverings</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502F</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502F</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502F.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502F.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502G: roofing materials for low-cost housing construction</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502G</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502G</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502G.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502G.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502H: surface treatment for corrosion protection of steel members for low-cost housing construction</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502H</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502H</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502H.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502H.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502I: investigation of plastic caulking materials for low-cost housing construction</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502I</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502I</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502I.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502I.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502J: heat transfer measurements in connection with thermal insulation of low-cost housing</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502J</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502J</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502J.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502J.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502K: ventilation problems (including air infiltration of windows and doors) as related
to low-cost housing</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502K</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502K</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502K.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502K.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502L: heating equipment as related to low-cost housing</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502L</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502L</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502L.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502L.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 502M: methods of investigation of cement-water paints</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 502M</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.502M</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular502M.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.502M.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 503: propane, butane, and related fuels (supersedes Letter Circular 292)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 503</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.503</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular503.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.503.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 504: variety reduction effected by the application of simplified practice through cooperative
efforts of industry and the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 504</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.504</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular504.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.504.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 505: classification of acoustic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 505</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.505</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular505.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.505.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 506: sound absorption coefficients of the more common acoustic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 506</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.506</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular506.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.506.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 507: publications on polarimetry and its application to the sugars and their derivatives
(revision of Letter Circular 272)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 507r1937</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.507r1937</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular507r1937.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.507r1937.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 508: odorous fumes from sulphate pulp mills</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 508</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.508</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular508.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.508.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 509: railway track scale testing service of the National Bureau of Standards fiscal year
1937 (July 1, 1936 to June 30, 1937)</span><br><span class="publication_date"><label class="label">Date Published: </label>1937</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 509</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.509</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular509.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.509.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 510: protective coatings for underground piping systems (superseding Letter Circular 435)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 510</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.510</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular510.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.510.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 511: information on ultraviolet transparency of window materials and fabrics (supersedes
Letter Circular 235, 429, and 113)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 511</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.511</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular511.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.511.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 512: automobile costs</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 512</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.512</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular512.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.512.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 513: sources of radio information (replaces Letter Circular 474)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 513r1938</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.513r1938</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular513r1938.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.513r1938.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 514: dampness in masonry walls above grade (replaces Letter Circular 391)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 514</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.514</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular514.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.514.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 515: selenium cells; photocells; thermopiles (supersedes Letter Circular 199)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 515r1938</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.515r1938</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular515r1938.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.515r1938.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 516: legibility of ledgers</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 516</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.516</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular516.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.516.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 517: motorists' manual of weights and measures</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 517</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.517</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular517.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.517.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 518: the corrosively of soils (supersedes Letter Circular 433)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 518</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.518</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular518.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.518.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 519: cathodic protection of pipelines</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 519</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.519</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular519.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.519.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 520: automobile costs (supersedes Letter Circular 512)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 520</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.520</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular520.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.520.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 521: corrosion and protection of underground tanks and burial vaults</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 521</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.521</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular521.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.521.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 522: metallurgy:publications by staff of the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 522</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.522</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular522.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.522.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 523: lubrication - publications by staff of the National Bureau of Standards 1910-1937</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 523</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.523</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular523.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.523.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 524: aeronautical publications (supersedes Letter Circular 325)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 524</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.524</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular524.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.524.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 525: color harmony: an annotated bibliography (superseding Letter Circular 356)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 525</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.525</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular525.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.525.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 526: color charts; a descriptive list (superseding Letter Circular 358 and 481)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 526</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.526</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular526.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.526.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 527: abrasives and abrasive products</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 527</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.527</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular527.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.527.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 528: testing laboratories equipped for thermal expansion tests of solids (supersedes Letter
Circular 234)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 528</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.528</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular528.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.528.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 529: vehicle-scale testing service of the National Bureau of Standards conducted in cooperation
with the States, November, 1936 - May, 1938</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 529</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.529</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular529.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.529.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 530: salt spray test</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label>WH Mutchler, RW Buzzard, PWC Strausser</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 530</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.530</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular530.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.530.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 531: photography and its applications (revision of Letter Circular 332)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 531r1938</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.531r1938</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular531r1938.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.531r1938.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 532: rubber - list of publications (replaces Letter Circular 178)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 532</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.532</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular532.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.532.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 533: sources of information on the properties of metals and alloys (books)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 533</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.533</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular533.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.533.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 534: commercial testing laboratories equipped for chemical analysis (supersedes Letter
Circular 196)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 534</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.534</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular534.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.534.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 535: aluminum foil insulation (supersedes Letter Circular 465)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 535</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.535</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular535.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.535.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 536: inorganic analytical chemistry: publications by the staff of the National Bureau of
Standards (1901-1938)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 536</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.536</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular536.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.536.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 537: railway track scale testing service of the National Bureau of Standards fiscal year
1938 (July 1, 1937 to June 30, 1938)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 537</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.537</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular537.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.537.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 538: transparent wrapping materials (replaces Letter Circular 455)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 538</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.538</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular538.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.538.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 539: sound absorption coefficients of the more common acoustic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 539</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.539</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular539.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.539.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 54 (Communication B420): protection of track scale parts from corrosion</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 54</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.54</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular54.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.54.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 540: artificial abrasives and abrasive products (replaces Letter Circular 527)</span><br><span class="publication_date"><label class="label">Date Published: </label>1938</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 540</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.540</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular540.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.540.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 541: classification of acoustic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 541</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.541</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular541.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.541.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 542: list of publications relating to paint, painting, varnish, lacquer, bitmens and allied
subjects (supersedes Letter Circular 478)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 542</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.542</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular542.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.542.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 543: paper and related subjects (supersedes Letter Circular 447)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 543</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.543</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular543.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.543.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 544: policy of the National Bureau of Standards with regard to tests for agencies outside
the Bureau</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 544</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.544</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular544.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.544.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 545: photoelectric colorimeters (superseding Letter Circular 473)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 545</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.545</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular545.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.545.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 546: gases (supersedes Letter Circular 80)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 546</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.546</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular546.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.546.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 547: preparation and colorimetric properties of a magnesium-oxide reflectance standard
(superseding Letter Circular 395)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 547</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.547</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular547.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.547.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 548: specification for proving rings for calibrating testing machines (superseding Letter
Circular 409)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 548</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.548</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular548.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.548.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 549: information on ultraviolet transparency of window materials and fabrics (supersedes
Letter Circular 235, 429, and 511)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 549</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.549</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular549.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.549.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 55: equipment for testing and adjusting railroad track scales</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 55</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.55</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular55.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.55.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 550: fluorescence and phosphorescence</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 550</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.550</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular550.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.550.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 551: good gasoline (supersedes Letter Circular 281)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 551</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.551</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular551.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.551.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 552: building materials and structures reports</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 552</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.552</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular552.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.552.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 553: electric batteries and standard cells: publications by the staff of the National Bureau
of Standards and references to other sources of information</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 553</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.553</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular553.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.553.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 554: electrical measuring instruments, meters and their accessories (superseding Letter
Circular 364 and 233)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 554</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.554</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular554.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.554.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 555: building regulation (superseding Letter Circular 458)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 555</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.555</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular555.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.555.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 556: automotive brake lining</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 556</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.556</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular556.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.556.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 557: list of commercial standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 557r1939</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.557r1939</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular557r1939.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.557r1939.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 558: dental materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 558</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.558</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular558.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.558.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 559: the certification plan its significance, scope and application to selected Federal
specifications and commercial standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 559</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.559</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular559.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.559.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 56: methods of radio direction finding as an aid to navigation: the relative advantages
of locating the direction finder on shore and on shipboard</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 56</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.56</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular56.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.56.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 560: list of weights and measures offices of the States and District of Columbia (supersedes
Letter Circular 390)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 560</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.560</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular560.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.560.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 561: list of simplified practice recommendations (supersedes Letter Circular 345)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 561r1939</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.561r1939</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular561r1939.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.561r1939.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 562: weights and measures: National Bureau of Standards publications of general interest
(supersedes Letter Circular 492)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 562</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.562</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular562.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.562.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 563: classification and tolerances for commercial standard weights that will be accepted
for certification by the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 563</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.563</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular563.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.563.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 564: classification and tolerances for laboratory weights that will be accepted for certification
by the National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 564</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.564</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular564.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.564.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 565: standard frequencies and other services broadcast by National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 565</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.565</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular565.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.565.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 566: electrodeposition (supersedes Letter Circular 121)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 566r1939</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.566r1939</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular566r1939.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.566r1939.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 567: methods of using standard frequencies broadcast by radio (replaces Letter Circular
498)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 567</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.567</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular567.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.567.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 568: list of commercial standards (supersedes Letter Circular 557)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 568r1939</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.568r1939</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular568r1939.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.568r1939.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 569: gypsum</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 569</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.569</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular569.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.569.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 57: tests on asbestos and rubber sheet packing</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 57</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.57</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular57.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.57.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 570: standards and specifications for buildings and construction materials, fixtures, supplies,
and equipment (superseding Letter Circular 323)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 570r1939</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.570r1939</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular570r1939.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.570r1939.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 571: optical instruments, refractometry, and optical glass (superseding Letter Circular
485)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 571</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.571</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular571.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.571.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 572: device for testing snag resistance of stockings</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 572</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.572</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular572.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.572.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 573: sound absorption coefficients of the more common acoustic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 573</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.573</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular573.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.573.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 574: paint, varnish and bituminous materials (replacing Letter Circular 59, 212, and 291)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 574</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.574</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular574.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.574.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 575: the ionosphere and radio transmission conditions, with special reference to the observing
and reporting service of the National Bureau of Standards (replaces Letter Circular
499)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 575</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.575</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular575.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.575.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 576: inorganic analytical chemistry (supersedes Letter Circular 536)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 576</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.576</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular576.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.576.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 577: Leather</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 577</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.577</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular577.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.577.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 578: sources of radio information (replaces Letter Circular 513)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 578r1939</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.578r1939</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular578r1939.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.578r1939.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 579: list of commercial standards (supersedes Letter Circular 568)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 579r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.579r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular579r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.579r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 58: specification for three-inch shelves</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 58</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.58</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular58.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.58.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 580: railway track scale testing service of the National Bureau of Standards fiscal year
1939 (July 1, 1938 to June 30, 1939)</span><br><span class="publication_date"><label class="label">Date Published: </label>1939</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 580</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.580</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular580.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.580.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 581: color of illuminant and efficiency of the worker (superseding Letter Circular 352)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 581</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.581</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular581.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.581.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 582: list of simplified practice recommendations (supersedes Letter Circular 561)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 582r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.582r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular582r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.582r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 583: literature on drycleaning</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 583</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.583</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular583.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.583.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 584: standard specifications for sieves (supersedes Letter Circular 74)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 584</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.584</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular584.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.584.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 585: classification of acoustic materials</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 585</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.585</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular585.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.585.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 586: list of publications of interest to the general public (superseding Letter Circular
416)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 586</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.586</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular586.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.586.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 587: ceramics (miscellaneous) (supersedes Letter Circular 131)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 587</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.587</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular587.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.587.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 587A: whiteware (supersedes Letter Circular 131-A)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 587A</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.587A</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular587A.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.587A.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 587C: refractories (supersedes Letter Circular 131C)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 587C</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.587C</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular587C.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.587C.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 587D: enamels (supersedes Letter Circular 131D)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 587D</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.587D</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular587D.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.587D.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 588: the National Association of Hosiery Manufactures NAHM snag resistance tester</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label>Howard E Shearer, EMax Schenke</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 588</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.588</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular588.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.588.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 589: list of commercial standards (supersedes Letter Circular 579)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 589r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.589r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular589r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.589r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 58 </span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 58r1924</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.58r1924</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular58r1924.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.58r1924.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 58 </span><br><span class="publication_date"><label class="label">Date Published: </label>1925</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 58r1925</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.58r1925</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular58r1925.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.58r1925.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 59: paints, varnish, etc</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 59</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.59</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular59.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.59.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 590: simplified practice, its purpose and application (supersedes Letter Circular 456)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 590</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.590</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular590.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.590.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 591: standards of frequency and musical pitch broadcast by National Bureau of Standards
(replaces Letter Circular 565)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 591r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.591r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular591r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.591r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 592: building materials, building standards, home building</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 592</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.592</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular592.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.592.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 593: weights and measures (supersedes Letter Circular 562)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 593</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.593</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular593.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.593.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 594: list of simplified practice recommendations (supersedes Letter Circular 582)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 594r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.594r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular594r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.594r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 595: engineering mechanics (superseding Letter Circular 316)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 595</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.595</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular595.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.595.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 596: domestic heating and air conditioning</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 596</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.596</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular596.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.596.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 597: carbon paper and typewriter ribbons</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 597</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.597</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular597.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.597.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 599: publications relating to building codes and construction practice home building --
building material specifications -- home maintenance (superseding Letter Circular
432)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 599r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.599r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular599r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.599r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 59: paints, varnish, etc</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 59r111924</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.59r11/1924</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular59r111924.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.59r11/1924.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 59: paints, varnish, etc</span><br><span class="publication_date"><label class="label">Date Published: </label>1923</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 59r1923</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.59r1923</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular59r1923.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.59r1923.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 59: paints, varnish, etc</span><br><span class="publication_date"><label class="label">Date Published: </label>1927</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 59r1927</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.59r1927</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular59r1927.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.59r1927.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 59: paints, varnish, etc</span><br><span class="publication_date"><label class="label">Date Published: </label>1924</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 59r051924</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.59r5/1924</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular59r051924.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.59r5/1924.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 6: National Bureau of Standards</span><br><span class="publication_date"><label class="label">Date Published: </label>1921</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 6</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.6</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular6.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.6.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 60: accident prevention and safety</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 60</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.60</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular60.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.60.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 600: timekeeping through the ages</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label>Katharine S Vandoren</span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 600</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.600</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular600.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.600.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 601: sources of information on the properties of metals and alloys (books)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 601</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.601</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular601.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.601.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 602: x-rays</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 602</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.602</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular602.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.602.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 603: outside house painting</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 603</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.603</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular603.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.603.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 604: list of commercial standards (supersedes Letter Circular 589)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 604r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.604r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular604r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.604r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 605: export trade expansion and retention through certification of quality</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 605</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.605</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular605.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.605.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 606: radio (supersedes Letter Circular 40)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 606</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.606</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular606.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.606.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 607: the certification plan, its significance, scope and application to selected Federal
specifications and commercial standards (superseding Letter Circular 559)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 607</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.607</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular607.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.607.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 608: detergents and related subjects (superseding Letter Circular 403)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 608</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.608</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular608.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.608.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 609: list of commercial standards (supersedes Letter Circular 604)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 609r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.609r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular609r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.609r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 60: publications relating to accident prevention and safety</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 60r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.60r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular60r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.60r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 61: hardened copper</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 61</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.61</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular61.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.61.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 610: electric batteries and standard cells (supersedes Letter Circular 553)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 610</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.610</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular610.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.610.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 611: sources of radio information (supersedes Letter Circular 578)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 611</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.611</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular611.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.611.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 612: list of simplified practice recommendations (supersedes Letter Circular 594)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 612r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.612r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular612r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.612r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 613: automobile engine lubricating oils (supersedes Letter Circular 407)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 613r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.613r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular613r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.613r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 614: radio transmission and the ionosphere (supersedes Letter Circular 575)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 614</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.614</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular614.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.614.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 615: distance ranges of radio waves (supersedes Letter Circular 317)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 615</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.615</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular615.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.615.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 616: etching of designs and lettering on metals</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 616</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.616</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular616.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.616.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 617: measurement of the reflectance of manila rope fiber (supersedes Letter Circular 393)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 617</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.617</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular617.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.617.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 618: export trade expansion and retention through certification of quality (supersedes
Letter Circular 605)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 618</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.618</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular618.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.618.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 619: standards and specifications for building and construction materials, fixtures, supplies,
and equipment (superseding Letter Circular 570)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 619r1940</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.619r1940</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular619r1940.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.619r1940.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 61: hardened copper</span><br><span class="publication_date"><label class="label">Date Published: </label>1926</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 61r1926</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.61r1926</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular61r1926.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.61r1926.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 62: proposed revision of rule 86 of the National Electrical Code on radio equipment</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 62</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.62</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular62.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.62.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 620: the model state law on weights and measures (includes amendments adopted in 1936 and
1940)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 620</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.620</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular620.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.620.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 621: railway track scale testing service of the National Bureau of Standards fiscal year
1940 (July 1, 1939 to June 30, 1940)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 621</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.621</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular621.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.621.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 622: building regulation (superseding Letter Circular 555)</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 622</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.622</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular622.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.622.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 623: weights of coal</span><br><span class="publication_date"><label class="label">Date Published: </label>1940</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 623</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.623</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular623.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.623.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 624: list of commercial standards (supersedes Letter Circular 609)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 624r1941</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.624r1941</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular624r1941.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.624r1941.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 625: electrodeposition (supersedes Letter Circular 566)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 625r1941</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.625r1941</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular625r1941.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.625r1941.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 626: guide to the literature on rubber (supersedes Letter Circular 501)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 626</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.626</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular626.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.626.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 627: the care of floors (supersedes Letter Circular 388)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 627</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.627</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular627.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.627.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 628: colorimetry and spectrophometry</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 628</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.628</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular628.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.628.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 629: list of simplified practice recommendations (supersedes Letter Circular 612)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 629r1941</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.629r1941</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular629r1941.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.629r1941.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 63: testing of spark plugs</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 63</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.63</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular63.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.63.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 630: bluing of iron and steel</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 630</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.630</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular630.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.630.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 631: sun lamps, health lamps; carbon and mercury arc lamps (supersedes Letter Circular
462)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 631</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.631</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular631.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.631.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 632: sound absorption coefficients of the more common acoustic materials (supersedes Letter
Circular 573)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 632</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.632</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular632.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.632.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 633: classification of acoustic materials (supersedes Letter Circular 585)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 633</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.633</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular633.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.633.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 634: rubber - list of publications (supersedes Letter Circular 532)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 634</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.634</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular634.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.634.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 635: radiometry (supersedes Letter Circular 448)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 635</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.635</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular635.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.635.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 636: publications on acoustics by members of the staff of the National Bureau of Standards
(supersedes Letter Circular 380)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 636</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.636</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular636.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.636.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 637: losses of gasoline in storage and handling (supersedes Letter Circular 427)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 637</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.637</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular637.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.637.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 638: testing of hosiery</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 638</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.638</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular638.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.638.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 639: dyeing and finishing of hosiery (supersedes Letter Circular 436)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 639</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.639</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular639.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.639.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 64: shingle stains</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 64</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.64</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular64.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.64.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 640: selection and care of hosiery</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 640</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.640</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular640.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.640.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 641: cement (supersedes Letter Circular 494)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 641</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.641</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular641.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.641.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 642: concrete and reinforced concrete (supersedes Letter Circular 495)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 642</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.642</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular642.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.642.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 643: structural clay products, stone, and masonry (supersedes Letter Circular 496)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 643r1941</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.643r1941</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular643r1941.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.643r1941.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 644: list of commercial standards (supersedes Letter Circular 624)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 644r1941</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.644r1941</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular644r1941.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.644r1941.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 645: methods of using standard frequencies broadcast by radio (supersedes Letter Circular
567)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 645</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.645</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular645.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.645.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 646: materials in the National Bureau of Standards soil-corrosion tests</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 646</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.646</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular646.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.646.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 647: list of published material relating to home building and maintenance (supersedes Letter
Circular 287)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 647</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.647</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular647.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.647.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 648: home heating problems: list of publications and articles (superseding Letter Circular
284)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 648r1941</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.648r1941</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular648r1941.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.648r1941.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 649: domestic heating and air conditioning</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 649</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.649</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular649.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.649.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 65: electron tube amplifier using 60 cycle alternating current to supply power for the
filaments and plates</span><br><span class="publication_date"><label class="label">Date Published: </label>1922</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 65</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.65</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular65.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.65.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 650: list of weights and measures offices of the States and District of Columbia (supersedes
Letter Circular 560)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 650</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.650</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular650.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.650.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 651: variety reduction effected by the application of simplified practice (supersedes Letter
Circular 504)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 651</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.651</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular651.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.651.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 652: fluorescent lamps</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 652</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.652</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular652.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.652.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 653: publications relating to building codes and construction practice home building --
building material specifications -- home maintenance (superseding Letter Circular
599)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 653r1941</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.653r1941</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular653r1941.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.653r1941.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 654: alphabetical list of simplified practice recommendations (supersedes Letter Circular
629)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 654r1941</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.654r1941</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular654r1941.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.654r1941.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 655: list of commercial standard (supersedes Letter Circular 644)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 655r1941</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.655r1941</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular655r1941.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.655r1941.ris" download="">Download Citation</a><br></div>
<div class="report-paper"><span class="titles"><label class="label">Title: </label>Letter Circular 656: electric batteries and standard cells (supersedes Letter Circular 610)</span><br><span class="publication_date"><label class="label">Date Published: </label>1941</span><br><span class="authors"><label class="label">Authors: </label></span><br><span class="report-number"><label class="label">Report Number: </label>LCIRC 656</span><br><span class="doi_data"><label class="label">doi:</label>10.6028/NBS.LCIRC.656</span><br><a href="http://nvlpubs.nist.gov/nistpubs/Legacy/LC/nbslettercircular656.pdf">Download PDF</a> | <a href="./bib/NBS.LCIRC.656.ris" download="">Download Citation</a><br></div>