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 630
a rule, carry so much metal-lies. By reason of these inetallics. much of this matte was very ditficult to sample accu-rately, as will be easily understood. The weights of these 160 iots varied from 65 U)s. to42,000lbs., averaging not less than 30,000 lbs. Their average assay contents were 071 oz.… … Fig. C—Bridgemanssampler. a^es for the sake of comparison, the average differences were as follows : 54 hand samples—gold, 546 ; silver, 2-24 ; copper, 1-29. IGO machine samples—gold, 283 ; silver, 1 06;coppei-, 0*4o. Bridgemans Small Ore-sampling Machine (Fig. 6) is a modification of the large…
Mechanical engineering
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