Front view of a wedge furnace used for charcoal activation at the Development Division of the Chemical Warfare Service in Cleveland, Ohio. The furnace is used for the development and testing of chemical warfare strategies during World War I. Photograph taken on February 6, 1919.

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Size: 8448px × 5756px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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