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, employees Isidor (Jerry) Chesler and Zach P. Halpin, and other members of the technical and experimental staff. Among the documents for 1913 are items pertaining to experimental work on rectifiers, phonographs, motion pictures, and storage batteries. There are also references to the formation of a manufacturing committee and to the acoustic properties of the music room and Edisonâ€™s library. An incomplete series of weekly test room reports by Halpin, covering the period March-September, appears at the end of the folder.
Approximately 60 percent of the documents have been selected. The material not selected relates to billing, shipments, and other routine matters. Courtesy of Thomas Edison National Historical Park.