Frank K. Marvin, an explosives chemist, was responsible for overseeing the chemical laboratory of the Bureau of Mines in Pittsburgh, Pennsylvania. This photograph was taken in November 1918 as part of a documentation of war work and the activities of the Bureau of Mines.

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Size: 8448px × 5862px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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