Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 425
lows are essentially the same as those in the dry-crushing silver-mills. (See also AmalgamatingMachinery.) 406 MILLS, GOLD, SILVER, AND COPPER. Silver-Mill Performances.—The following data exhibit the performance of the International Millat White Pine, which has 60 stamps, 30 crushing dry and 30… … ^JB&PlL * -IHJ of drop in inches, 7i; number of drops per minute, 93 ; screens made of brass wire ; trade numberof the screens, 50; tons of rock crushed in 24 hours, S3; tons crushed per stamp per 24 hours, 1.1;quality of the rock, soft; formation, limestone ; fineness of the bullion, 990.…
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