A Vacuum tube testing laboratory at Camp Alfred Vail, New Jersey. This photograph, with the subject number 45478 and taken by the photographer 412-19, shows the equipment used for testing vacuum tubes during World War One. The image is a part of the collection titled "Photographs of American Military Activities during World War One".

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Size: 8542px × 5802px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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