Image depicting the Chemical Warfare Service's Mechanical Research by Clark during World War One. It shows a pad and harness removed from a mask and fastened on a person to demonstrate the position taken during a front view. Date: July 12, 1918.

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

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