"Chemical laboratory at Henry Disston and Sons in Philadelphia, PA during World War I. This room is used for weighing steel drillings to determine the various elements present, with weights to the millionth part of a pound. Photograph taken by Pvt. R. W. Young on November 29, 1918."

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Size: 8391px × 5637px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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