In this photograph, Clark is conducting mechanical research in the Research Division of the Chemical Warfare Service. He is utilizing an eyepiece abrading apparatus, which was received from the Research Division. The photo was taken on July 2, 1918, under the description number AU.

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Size: 8484px × 5809px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., .., 1143, 54538, abrading, activities, american, apparatus, au, chemcial, chemical, clark, description, div., division, documentation, evidence, eyepiece, mechanical, military, number, photograph, photographer, photographic, research, service, technology, uc, war, warfare, wartime, world