File:Dr. D.C. Bardwell, of the Research Lab. of the U.S. Bureau of Mines, collecting gaseous radium emanation. The radium is in the little safe at the right. Collections are made at intervals of LCCN2016887181.jpg
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Summary[edit]
DescriptionDr. D.C. Bardwell, of the Research Lab. of the U.S. Bureau of Mines, collecting gaseous radium emanation. The radium is in the little safe at the right. Collections are made at intervals of LCCN2016887181.jpg |
English: Title: Dr. D.C. Bardwell, of the Research Lab. of the U.S. Bureau of Mines, collecting gaseous radium emanation. The radium is in the little safe at the right. Collections are made at intervals of from 4 to 10 days. The gas is drawn off under vacuum and purified by a liquid air refrigeration. The purified gas, very small in volume but powerful in its action is used in the study of gas reactions. The work is under the direct supervision of Dr. S.C. Lind, chief chemist of ther Bureau of Mines
Abstract/medium: 1 negative : glass ; 5 x 7 in. or smaller |
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Library of Congress
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Author | Harris & Ewing, photographer | ||
Permission (Reusing this file) |
No known restrictions on publication. For more information, see Harris & Ewing Photographs - Rights and Restrictions Information https://www.loc.gov/rr/print/res/140_harr.html
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Collection InfoField | Harris & Ewing Collection | ||
Notes InfoField |
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Part of InfoField | harris & ewing collection · prints and photographs division | ||
Subject InfoField | united states · glass negatives | ||
Location InfoField | united states | ||
Place InfoField | United States | ||
Genre InfoField | Glass negatives |
Licensing[edit]
Public domainPublic domainfalsefalse |
This work is from the Harris & Ewing collection at the Library of Congress. According to the library, there are no known copyright restrictions on the use of this work. |
Public domainPublic domainfalsefalse |
This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:12, 17 May 2018 | 10,212 × 7,416 (14.28 MB) | Fæ (talk | contribs) | LOC upscale 1,024 × 744 → 10,212 × 7,416 | |
09:35, 28 March 2018 | 1,024 × 744 (295 KB) | Fæ (talk | contribs) | Library of Congress Harris & Ewing Collection 1924 LCCN 2016887181 jpg # 34,274 / 41,540 |
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