This folder contains correspondence, reports, and other documents relating to experiments and tests conducted at the West Orange laboratory. Also included are lists of experimental accounts chargeable to the Edison General Electric Co., correspondence pertaining to laboratory contracts, and documents regarding the purchase of a complete set of U.S. electrical patents.

Approximately 50 percent of the documents have been selected. The following categories of documents have not been selected: storekeepers' orders and receipts; monthly meter accounts for electric lighting supplied by the laboratory plant to the Edison Phonograph Works and various homeowners in Llewellyn Park; duplicate copies of selected documents.