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Digital Collections

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Selenium; photocells; themopiles

  • Letter circular LC-515

  • 1938

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Public Domain

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This circular from the U.S. Department of Commerce, National Bureau of Standards lists the attributes of selenium cells, photocells, photolytic cells, and thermopiles. The circular includes bibliographic sources for each and from which companies they can be purchased. These are light-sensitive devices used in electronics.

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  • 5 pages
  • 27 cm H.
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Rights Public Domain Mark 1.0
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  • Courtesy of Science History Institute

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Related Items

Cite as

“Selenium; Photocells; Themopiles.” Washington (D.C.): United States. National Bureau of Standards, 1938. https://digital.sciencehistory.org/works/h415pb445.

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Small JPG1200 x 1581px — 395 KBLarge JPG2880 x 3794px — 2.1 MBFull-sized JPG4979 x 6560px — 5.9 MBOriginal fileTIFF — 4979 x 6560px — 93.5 MB

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Small JPG1200 x 1569px — 395 KBLarge JPG2880 x 3766px — 2.0 MBFull-sized JPG5030 x 6577px — 5.9 MBOriginal fileTIFF — 5030 x 6577px — 94.7 MB

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Small JPG1200 x 1562px — 362 KBLarge JPG2880 x 3749px — 2.0 MBFull-sized JPG5020 x 6535px — 5.7 MBOriginal fileTIFF — 5020 x 6535px — 93.9 MB

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Small JPG1200 x 1566px — 317 KBLarge JPG2880 x 3759px — 1.8 MBFull-sized JPG5013 x 6543px — 5.6 MBOriginal fileTIFF — 5013 x 6543px — 93.9 MB

The Science History Institute recognizes there are materials in our collections that may be offensive or harmful, containing racist, sexist, Eurocentric, ableist, or homophobic language or depictions. The history of science is not exempt from beliefs or practices harmful to traditionally marginalized groups. The Institute is engaged in ongoing efforts to responsibly present and address the evidence of oppression and injustice inextricable from the history of science. If you would like to learn more about our ongoing efforts or if you encounter harmful, inaccurate, or insufficient descriptions, please contact us at digital@sciencehistory.org.