This folder contains correspondence and other documents relating to the primary batteries produced by the Edison Manufacturing Co. The items for 1909 pertain mainly to the origin, amount, and cost of zinc used by the company in its batteries. Also included are letters in opposition to a tariff on zinc being considered by the U.S. Senate; a memorandum regarding the use of National Phonograph Co. salesmen to sell primary batteries; and a series of daily reports on orders received. A sample of these reports has been selected.

Approximately 20 percent of the documents have been selected. The items not selected consist primarily of daily reports.