[An undated letter by Miller Reese Hutchison from September 1914, misfiled in the 1915 "Submarine" folder, was added in May 2014. The letter refers to a chlorine gas leak aboard the E-2 submarine caused by its lead-acid storage battery.]

This folder contains correspondence and other documents relating to the use of Edison's storage battery in submarines. Included are references to batteries for German and Russian submarines and to the development of wireless telegraphy. Most of the correspondence is by Edison's chief engineer, Miller Reese Hutchison, whose own pending patent for a submarine battery cell is mentioned.

Approximately 80 percent of the documents have been selected. The unselected material consists primarily of duplicates of selected items.