This folder contains correspondence and other documents relating to the operation of the West Orange laboratory. Included are inquiries regarding real estate adjoining the laboratory, correspondence concerning supplies and instruments, a receipt for taxes paid by the Ott Manufacturing Co., and several memoranda in Edison's hand containing instructions and listing supplies needed for the laboratory.

Approximately 30 percent of the documents have been selected. The items not selected include statements, circulars, and routine correspondence regarding supplies, along with documents that duplicate information in selected material.