Cpl. Newberg of the Signal Corps is shown in the photo taken on January 23, 1919, handling the Sumber Dynamotor Type 1. The dynamotor is mounted on improvised testing equipment from the Bureau of Standards and is being used to determine the most suitable brush pressure. This photo is marked as "For Official Use Only" and should not be published.

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Size: 8695px × 5835px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: .., 5, 23, 1919, activities, american, brush, bureau, cpl., dynamotor, equipment, improvised, jan., mar., military, newberg, official, photographs, pressure, publication, standards, testing, war, world