04/04/1917 Daniels, Josephus to Edison, Thomas Alva
(U.S. Navy Yard (Brooklyn)) Ships, yachts, and other vessels; Light and optics [Extract]
[X128C23]  Charles Hummel Collection, Wayne, N.J.: Edison Wartime Research Report No. 23: Range Finder -- To Keep Free from Spray
[X128C23B; TAEM 0:0]
Courtesy of Charles Hummel.