Mines & mineral resources. Colorado Activities, Western smelting works, grand island district lodes; dist. R. 14 q. News. Nov. 30, 1870. p.4 c.3 Thatcher, Standley and co. gold shipments; activities. R. M. News. Dec. 1, 1870. p.4 c.3 advantages of dynamite in mining. R. M. News. Dec. 2, 1870. p.1 c.2 Body of employe found near Brown mine. R. M. News. Dec. 4, 1870. p.4 c.3 Ore process; list.R. M. News. Dec. 22, 1870. p.2 c.1 Brown silver mining company shipment; coin value. R. M. News. Dec. 24, 1870. p.4 c.1
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