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.tif
![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.tif](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Dr._D.C._Bardwell%2C_of_the_Research_Lab._of_the_U.S._Bureau_of_Mines%2C_collecting_gaseous_radium_emanation._The_radium_is_in_the_little_safe_at_the_right._Collections_are_made_at_intervals_of_LCCN2016887181.tif/lossy-page1-800px-thumbnail.tif.jpg?20180328093620)
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[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.tif |
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 |
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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 |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:36, 28 March 2018 | ![]() | 10,212 × 7,416 (144.45 MB) | Fæ (talk | contribs) | Library of Congress Harris & Ewing Collection 1924 LCCN 2016887181 tif # 34,274 / 41,540 |
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Image title | HEC/32200/32234a.tif |
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Camera manufacturer | Leaf |
Camera model | Leaf Aptus-II 12(LI301506 )/Schneider Lens Control |
Author | Library of Congress; The Crowley Company |
Width | 10,212 px |
Height | 7,416 px |
Compression scheme | Uncompressed |
Pixel composition | Black and white (Black is 0) |
Image data location | 980 |
Orientation | Normal |
Number of components | 1 |
Number of rows per strip | 7,416 |
Bytes per compressed strip | 151,464,384 |
Horizontal resolution | 1,400 dpi |
Vertical resolution | 1,400 dpi |
Data arrangement | chunky format |
Software used | Capture One 6; Adobe Photoshop CS4 |
File change date and time | 11:48, 8 December 2011 |