This folder contains correspondence and other documents relating to operations at the West Orange laboratory. Included are notes, memoranda, and interoffice communications by Edison, personal assistant William H. Meadowcroft, chief engineer Miller Reese Hutchison, and members of the technical and experimental staff. Some of the documents pertain to Charles Edison's work at the laboratory. There are also references to the organization of a new fire department at the Edison laboratory in October 1914, two months before the fire that destroyed the Edison Phonograph Works. Also included are lists of employees at the laboratory and phonograph works and correspondence with Steinway & Sons concerning repairs to a grand piano. An incomplete set of minutes of the Engineering Dept. Committee appears at the end of the folder.

Approximately 20 percent of the documents have been selected. The unselected items include lists of furnishings and supplies in the chemical laboratory and balance room.