Mines and mineral resources. Colorado., Golden district Ore treatment; value. R.M.News. Jan. 1,1874 p.2 c.2 Sapphires described by scientist. R.M.News. May 12,1874 p.4 c.3 Golden smelting works treat Poorman mine ore. R.M.News. Hug. 16,1874 p.4 c.3 Activities, Clear Creek. R.M.News. Sept. 2,1874 p.4 c.4 Coal miners war. R.M.News. Nov. 10,1874 p.4 c.3 Transcripts argues smelting works, Denver. R.M.News. Feb. 4,1875 p.4 c.l
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