This folder contains correspondence and other documents relating to the technical development of films, cameras, and projectors. Included are items pertaining to the experimental work on color photography contracted to Charles L. Brasseur, the testing of film stock developed by the Eastman Kodak Co. and the Lumière Co., and the evaluation of improvements submitted to the Edison Manufacturing Co. by outsiders, including the Pathé Frères, John H. Crosier, Hubert Meredith-Jones, and Charles M. Mapes. Among the correspondents are Frank L. Dyer, vice president of the Edison Manufacturing Co.; George F. Scull, assistant to the vice president; and Horace G. Plimpton, manager of negative production in the Kinetograph Department.

Approximately 50 percent of the documents have been selected. The items not selected include correspondence regarding improvements that the Edison Manufacturing Co. declined to pursue, as well as items that duplicate information in selected material.