This folder contains correspondence and other documents relating to the technical and commercial development of battery-powered streetcars by Ralph H. Beach and his Federal Storage Battery Car Co. Included is correspondence by Edison, Beach, and Frank L. Dyer, vice president and general counsel of the Edison Storage Battery Co., pertaining to streetcar design, performance, manufacture, sales, and promotion. Some of the letters express Edison's concern about the exaggerated claims made by Beach regarding the life of the Edison storage battery.

Approximately 80 percent of the documents have been selected. The items not selected consist primarily of letters of transmittal, unsolicited inquiries, and documents that duplicate information in selected material.