This folder contains correspondence, reports, and other documents relating to operations at the West Orange laboratory. Included are letters about the purchase of chemicals, the repair of the boiler-room roof, and the inspection of the laboratory for insurance and fire-safety purposes. There are also lists of individuals who held keys to the laboratory's front gate.

Approximately 40 percent of the documents have been selected. The following categories of documents have not been selected: routine internal memoranda regarding orders and shipments; laboratory storekeeper orders and receipts; routine cashier forms.

Courtesy of Thomas Edison National Historical Park.