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Process of Treating Slag and Furnace Therefor.
Patent for a process of treating slag and furnace therefore. It has an improved method for separates melted metals produced during smelting and extracting the precious metals from slag. The richer matte and base-bullion run off separately and into separate taps.
Date:
August 20, 1895
Creator:
van Cleve, Charles M. & Rhodes, Robert D.
Object Type:
Patent
System:
The Portal to Texas History
The Leadville Drainage Tunnel, Lake County, Colorado
Report issued by the Bureau of Mines over the Leadville Drainage Tunnel. Descriptions and details about the tunnel are presented. This report includes tables, maps, illustrations, and photographs.
Date:
August 1949
Creator:
Elgin, Robert A.; Volin, M. E. & Townsend, James W.
Object Type:
Report
System:
The UNT Digital Library