08/21/1917 Daniels, Josephus to Edison, Thomas Alva
(Warner, Selden Gloyd) Submarines and submarine warfare; Scientific and other instruments [Marginalia by Edison, Thomas Alva]
[X128C45]  Charles Hummel Collection, Wayne, N.J.: Edison Wartime Research Report No. 45: Hydrogen Detector
[X128C45B; TAEM 0:0]
Courtesy of Charles Hummel.