Members of the 1st Engineers division in Washington, are seen using the Paraboloid or Sound Locator. The photograph was taken by Sgt. Joe Hitz of the Signal Corps. The event took place during the First Division Parade. The image is labeled with the number 63,739 and was taken on September 17, 1919.

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Size: 8471px × 5754px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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