Category:D.C. Bardwell

Media in category "D.C. Bardwell"

The following 3 files are in this category, out of 3 total.

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  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 10,212 × 7,416; 14.28 MB
  
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  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 10,212 × 7,416; 144.45 MB
  
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  THC 2003.902.022 D. C. Bardwell Study of Nitrogen Fixation.tif 2,151 × 1,824, 2 pages; 11.24 MB