This folder contains correspondence and other documents relating to mines and minerals to be bought, sold, surveyed, worked, or tested. Among the items for 1917 are letters from W. E. Sterne regarding a nickel deposit near San Diego; an offer to buy Edison's cobalt mining property in the Temagami Forest reserve of Ontario; and a request to consult Edison's surveys of mining property in New Jersey.

Approximately 20 percent of the documents have been selected. The unselected items include requests for information that did not receive a substantive response from Edison, along with routine correspondence about the transmittal and receipt of samples.