This folder contains correspondence and other documents relating to mining and ore milling. Many of the letters are by John Birkinbine, a consulting mining engineer hired by Edison to evaluate mining properties and to advise him on related projects. Some of the documents pertain to requests for information about Edison's mining and ore milling machinery. Included also is an undated draft contract in Edison's hand regarding a proposed Edison Iron Concentration Co. of New Jersey.
Approximately 50 percent of the documents have been selected. The following categories of documents have not been selected: blueprints, drawings, and descriptions of the Siemens & Halske electrolytic process; routine requests for information and agencies; letters of transmittal and acknowledgement; duplicate copies of selected documents.
Related documents can be found in D-89-11 (Edison, T.A. - Book and Journal Orders); D-89-30 (Edison Machine Works - General) and D-89-70 (West Orange Laboratory - Suppliers). Courtesy of Thomas Edison National Historical Park.