This photograph shows the entrance to the tunnel at the Rock Island Arsenal in Illinois. It was taken on January 31, 1919. The image highlights a cable run for telephone installations. The caption contains technical details from the official description issued by on April 2, 1919.

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Size: 8565px × 5721px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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