This folder contains correspondence and other documents relating to the technical and commercial development of phonographs. Included are items pertaining to the original stockholders of the Edison Phonograph Works, phonograph sales in Europe, and Edison's process for molding and duplicating phonograph records. Also included is a letter regarding the suit brought against Edison by the New York Phonograph Co.

Approximately 50 percent of the documents have been selected. The items not selected consist of correspondence, contracts, and other documents concerning the business of Ralph H. Beach, G. Howlett Davis, and the Pianophone Co., a firm engaged in the manufacture of automatic pianos and perforated music rolls.