This folder contains correspondence and other documents relating to the operation of the West Orange laboratory. Included are lists and memoranda made by Edison concerning tasks to be done and chemicals and equipment to be obtained. Also included are letters pertaining to insurance, postal and express deliveries, laboratory letterhead, and the laboratory time clock.

Approximately 30 percent of the documents have been selected. Among the documents not selected are perfunctory items regarding laboratory supply, insurance, and orders placed with the General Electric Co. and the Bergmann Electric Works in Berlin.