20 pages matching pyrites in this book
Results 1-3 of 20
What people are saying - Write a review
We haven't found any reviews in the usual places.
amalgam assay assayers auriferous average batteries belt Bendigo blanketings boilers boring boxes cages calcination California cast-iron cent charge chlorination Clunes coarse compressed compressors Comstock lode concentration copper plates Coulterville country rocks crushed cylinder deep depth districts dollars drum eight engines expense feet long free gold furnaces geared gold-bearing Grass Valley gravel hanging wall hearth holes Idaho inches inches diameter inches in diameter iron kind latter machinery machines Mariposa County means mercury metalliferous mills miners mortars motive-power nearly Nevada City Nevada County nozzles obtained ordinary passed pipe piston placed power drills pressure pumping pyrites quartz quartz lodes residues retorts riveted rock sand schist School of Mines screens screw Section shaft Sierra County silver square inch stampers steam stopes Storey County stroke sulphurets superintendents surface tailings timber tons treatment tunnel underlay valve vertical Victoria Virginia City whilst width winding