Image shows Fieldner examining a gas mask in the Chemical Warfare Service's Research Division. The field apparatus being used is for G-34 detection, specifically testing the air in a trench. This photograph was received on July 12, 1918, and is labeled subject number 54769. Issued by the Chemical Warfare Service; Research Division.

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Size: 8441px × 5741px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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