This folder contains correspondence and other documents relating to mines and ores to be bought, sold, worked, or tested. Some of the items deal with the mining interests of individuals who either wanted to sell property to Edison or to have their ores tested. Included are letters concerning the lease of mining property in Putnam County, N.Y.
Approximately 20 percent of the documents have been selected. The following categories of documents have not been selected: routine inquiries receiving no significant reply; routine surveyors' reports; bills of lading; duplicate copies of selected items. Courtesy of Thomas Edison National Historical Park.