![](http://www.alamy.com/thumbs/6/16C9C92F-502D-4193-B80C-2A26DA57C84D/2RC9BCJ.jpg)
Members of the Wilham Hood Dunwoody Institute's Mechanical Training Detachments in Minneapolis, Minnesota attending a class on electrical theory. The photograph was taken on December 28, 1918. This training program was specifically designed for military purposes and was marked as "For Official use only".
Size: 8527px × 5741px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No
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