This folder contains correspondence and other documents relating to the commercial and technical development of Edison's alkaline storage battery. Included are items pertaining to Ralph H. Beach's proposed use of Edison batteries in streetcars; and inquiries about battery availability, use, and performance.

Approximately 50 percent of the documents have been selected. The items not selected include unsolicited letters requesting information about the batteries, two letters regarding bismuth metal for battery use, and a report by the Altoona Railroad Club of the Pennsylvania Railroad comparing electric and steam traction.