03/28/1917 Edison, Thomas Alva to Daniels, Josephus
(U.S. Naval Institute; U.S. Navy Yard (Brooklyn); U.S. Navy Dept) Submarines and submarine warfare; Military; Disc phonograph; Sound and acoustics
[X128C13]  Charles Hummel Collection, Wayne, N.J.: Edison Wartime Research Report No. 13: Phono. Range Finder
[X128C13C; TAEM 0:0]
Courtesy of Charles Hummel.