MINES AND MINERAL RESOURCES. COLORADO. nevada district Activities, Backus & Clayton mills; Burroughs SULLIVAN lodes. R.M. Nets. Idar. 27, 1861 p.2 c.2 Activities, lodes; mills; tunnels; companies; list. R.M. News. Apr. 11, 1861 p.2 c.4 Companies & mills; list; activities. R.i4. News. Apr. 25, 1861 p.2 c.4 The Burdsallts process. R.M. News. Aug. 15, 1861 p.3 c.1 Doctor Burdsall smelting process. R.irf. News. Aug. 17, 1861 p.3 c.2
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