This folder contains correspondence and other documents relating to the design and operation of automobiles and the use of storage batteries in electric vehicles. Included are letters from the Electric Vehicle Co. regarding the maintenance and motors of Edison's own electric vehicles and a letter from Hamilton Twombly, Jr., expressing satisfaction with the battery in his automobile.

Approximately 15 percent of the documents have been selected. The items not selected include notes and invoices regarding parts and supplies for automobiles and for electric motors.