This folder contains correspondence and other documents pertaining to the purchase, operation, and disposition of equipment and supplies for the West Orange laboratory and other Edison concerns. Several documents are written by Edison or bear his marginalia. One item contains a comment by Edison about the performance of his Carrier air conditioner. The correspondents include industrialist Richard M. Colgate, chief engineer Miller Reese Hutchison, consulting chemist A. E. Nienstadt, and representatives of Steinway & Sons, the piano manufacturers.

Less than 5 percent of the documents have been selected. The unselected material consists primarily of unsolicited correspondence from vendors and suppliers and routine documents concerning the settlement of accounts.

Courtesy of Thomas Edison National Historical Park.