This folder contains correspondence and other documents relating to the Menlo Park laboratory, where Edison worked from April 1876 until November 1882. Included are letters from suppliers; correspondence and memoranda by various members of the laboratory staff, including Edison; and other documents pertaining to the ordering of supplies and equipment for the laboratory.

Advertising circulars and unsolicited correspondence from suppliers have not been selected except in cases where an answer has been found.

Courtesy of Thomas Edison National Historical Park.