This folder contains correspondence and other documents relating to the procurement, sale, and testing of minerals. Included are inquiries by Edison to various mineral suppliers, along with letters requesting information from Edison and inquiring about ores that he might supply, process, or use. Among the documents for 1915 are letters from Charles Baskerville, professor of chemistry at the College of the City of New York, concerning an experimental plant for Morris & Co. in Chicago and the establishment of the American Catalyst Co. to exploit the patents of Baskerville and Dr. O. C. Hagemann. Also included is correspondence with Kenneth S. Guiterman, chief chemist for the American Smelting & Refining Co., regarding cobalt supplies. Other correspondents include longtime Edison associates Charles S. Bradley, Cloyd M. Chapman, Theron I. Crane, Herman E. Dick, and Spencer Trask & Co. of New York.
Approximately 20 percent of the documents have been selected. The material not selected consists primarily of unsolicited correspondence and other letters that received a perfunctory reply or no reply from Edison. Courtesy of Thomas Edison National Historical Park.