This folder contains correspondence and other documents relating to mining and ore milling. Some of the items pertain to the licensed use of Edison crushing rolls by a group of Chicago investors. Also included are letters enclosing ore samples or inquiring about Edison's interest in mines and ores.

Approximately 10 percent of the documents have been selected. The items not selected consist primarily of unsolicited inquiries, some of which bear perfunctory Edison marginalia, and items that duplicate information in selected material.