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 items for 1914 are letters concerning an experimental plant for Morris & Co. in Chicago and geology surveys in Tennessee. The correspondents include Charles Baskerville, professor of chemistry at the College of the City of New York.

Less than 5 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.