Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 540
1, was 4206 cents per ton, of which 194 cents wasfor labor and 33-66 cents for supplies. At the Golden Star mill (130 stamps) of the Home-stake Mining Co.. at Lead City, South Dakota, the cost of milling in 1887-88 was, accordingto Mr. H. 0. Hofman, 82-92 cents per ton. The best practice in… … Fig. 1.—Jordans centrifugal amalgamator. 516 MILLS, GOLD. from 80 to 85 per cent, and careful daily tests in some of the best gold-mills using concen-trators show from 85 to 90 per cent. The largest chlorination works in the world are at the famous I\Iount Morgan mine inNew Zealand, where a…
Mechanical engineering
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