This folder contains correspondence and other documents pertaining to the purchase of equipment and supplies for the West Orange laboratory and other Edison concerns. Among the documents for 1913 are numerous items written by Edison, or bearing his marginalia, relating to the procurement of chemicals, metals, milling machinery, waxes, and rubber goods. Included is correspondence with Marshall C. Lefferts of the Celluloid Co. and William L. Saunders of the Ingersoll-Rand Co.

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