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Mining Methods and Costs at Crystal-Victory and Minerva Number 1 Fluorspar Mines of Minerva Oil Company, Hardin County, Illinois

Description: Report issued by the U.S. Bureau of Mines discussing mining costs and methods of fluorspar mines in Hardin County, Illinois. As stated in the summary, "it describes the exploration, development, and mining practices, giving costs of each. Transportation, equipment, power, labor, and other influencing factors also are discussed" (p. 1). This report includes tables, maps, illustrations, and photographs.
Date: 1960
Creator: Montgomery, Gill; Daly, J. J. & Myslinski, Frank J.