Mortar Calculations - Fort Wright - Fishers Island, New York
Directing the range of the Mortars - Fort Wright - Fishers Island - New York, USA. Military Cadets using complex higher mathematical formulae and telephone instructions to work out the exact aiming, elevation necessary for modern warfare
Picture No
10586774
Media ID
45526066
Size
5748px x 3577px
(5.6MB)
Credit
Mary Evans / Grenville Collins Postcard Collection
Source
Photograph by Underwood & Underwood reproduced on a postcard
Date
circa 1920s
