. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. shero, as at other mines in the district, in the forms of lenses, as well asin the lar<re masses on either wall. At its northern end, this orebodyentered the han^nn<r-\vall fissure. The schist ore was characterized by2^/0 to 4/v of sulphides, mostly pyrite, which carries most of the ditTers from thi; slate ore, where of the jrold is free. The mill contains forty lOoO-Mj. slam])s, di-oppint; 1)6 times a minute;10 in. by 20 in. crusher. 5 Deister Overstrom
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. shero, as at other mines in the district, in the forms of lenses, as well asin the lar<re masses on either wall. At its northern end, this orebodyentered the han^nn<r-\vall fissure. The schist ore was characterized by2^/0 to 4/v of sulphides, mostly pyrite, which carries most of the ditTers from thi; slate ore, where of the jrold is free. The mill contains forty lOoO-Mj. slam])s, di-oppint; 1)6 times a minute;10 in. by 20 in. crusher. 5 Deister Overstrom tables, 24 six-ft. Frue\anners and a 5 ft. by (j ft. ball mill for re^rindin<^ sand. The crusher[•((luired a .{O-h.]). motor and the mill two motors. After crush-ing with stamps and amal<ranui1inf; free frold, the pulp was run overthe Deister tables, jjivinj; the first concentrate, then sand was fj^roundin the ball mill, amaljramated, and concentrate saved on the Fruevanners. The capacity is 200 tons a day. Tailing and concentratewere formerly cyanided. The coiu-entrate averaged $50 a ton in CfTitral Kureka Mine, nf>ar Sutter Creek. Total operating cost wlieii normal conditions jirevailed, in lltl4 andearlier, was $.]..]) a ton. The grey ore, running about $r).7() a a g(»od |Mofit at that time. The (»re .()()(), it is .said, hi 1H71 there were two shafts, one :10() feet and theother 500 feet deej). One shaft finally reached 550 feet in depth andanother 700 feet, when the company (piit work. The mine lay idlethereafter until March. lMJ>fi. when Central Kureka Mining Companybegan ojierations. The south shaft, 700 feet deep when the company started, was sunkto a depth of 1850 feet by the latter part of 1900, and a 10-stamp mill SACRAMKNTO FIKI,D DIVISION. 159 was built. Writing; in th
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