. First century of national existence; the United States as they were and powder, and the sandsfrom the stamps are passed through a varietyof machines designed to catch the arc solid blocks of the heaviest castiron attached to the end of a wooden or ironrod called the leg, to which the lifting camis apiilied for raising them. They common-ly weigh about 300 llis. each, though inCalifornia they are made of twice and eventhree times this weight. Several of tlieraare set ton-ether in a frame side by side, andare lifted in succession by the cams upon ahorizontal shaft, which revo
. First century of national existence; the United States as they were and powder, and the sandsfrom the stamps are passed through a varietyof machines designed to catch the arc solid blocks of the heaviest castiron attached to the end of a wooden or ironrod called the leg, to which the lifting camis apiilied for raising them. They common-ly weigh about 300 llis. each, though inCalifornia they are made of twice and eventhree times this weight. Several of tlieraare set ton-ether in a frame side by side, andare lifted in succession by the cams upon ahorizontal shaft, which revolves in front ofthem. The bed in which they stand, andinto which the ore to be crushed is thrown,is sometimes a massive anvil, hollow in thetop, firmly imbedded in a heavy stick oftimber, or is formed of stones, beaten by thestanqis themselves into a soli<t bed. Wateris usually supplied in small currents to thestamps, and sometimes mercury also is pour-ed into the bed. Tiie only exit for thecrushed materials is through .small holespunched in a sheet of copper, of which the. VOSEMITt VALLEY.
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Keywords: ., bookauthorhodgejam, bookcentury1800, bookdecade1870, bookyear1874
