This folder contains correspondence and other documents relating to operations at the West Orange laboratory. Included are notes from Edison to longtime associate Jonas Walter Aylsworth, master machinist Robert A. Bachman, and other members of his technical and experimental staff. Also included are items by Edison's personal assistant William H. Meadowcroft; Walter L. Eckert, general auditor of Thomas A. Edison, Inc.; and Carl H. Wilson, general manager of TAE Inc.

Approximately 30 percent of the documents have been selected. The items not selected include receipts, printed material from employee events, monthly statement pertaining to the consumption of electrical current on the third floor of the laboratory, memoranda concerning street cleaning, letters of transmittal and acknowledgment, duplicates.