. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. l. At a distance of 1500 north on 1140-foot level, a crosscut was driven east 175 cutting hanging-wall the 1600-foot level south the vein has a width of 24 with an averagevalue of about $6 per ton. While on the north ore shoot on the 5—27278 42 MINES AND MINERAL RESOURCES. 2000-foot level, the width of ore developed is 16 with an average assayvalue of $17 per ton. Plymouth Mill: The ore is hoisted from the mine in 2-ton skips toa 2-story hopper, the upper part being u
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. l. At a distance of 1500 north on 1140-foot level, a crosscut was driven east 175 cutting hanging-wall the 1600-foot level south the vein has a width of 24 with an averagevalue of about $6 per ton. While on the north ore shoot on the 5—27278 42 MINES AND MINERAL RESOURCES. 2000-foot level, the width of ore developed is 16 with an average assayvalue of $17 per ton. Plymouth Mill: The ore is hoisted from the mine in 2-ton skips toa 2-story hopper, the upper part being used for waste and the lowerfor ore; the capacity of ore bin is 120 tons. From the latter the ore is fedto a No. 5 Gates gyratory crusher, the discharge of which falls ontoa 20-inch belt conveyor, which conveys the ore for a distance of 630feet to top of mill. The maximum slope of conveyor is 21° 15. Theconveyor is made up in two sections with a length of 315 feet each. Theindividual sections are driven by 10 Fairbanks-^Iorse motors. Theore from conveyor discharges onto 16-inch automatic Link belt distribu-. Headframe at Pacific Shaft; also showing timber and machine shops. Plymouth ConsolidatedMmes, Plymouth, Amador County, California. tor which distributes the ore to 1400-ton bin. From the ore bin, theore is fed by Challenge machines to 30 stamps, weighing 1250 pounds,which drop 98 times per minute, with 7-inch drop, order of drop being1-3-5-2-4. Stamp duty is 15 tons per stamp per twenty-four hoursthrough 1-mesh screen. Only 20 stamps are being used at present,10 being kept in reserve. The pulp from batteries goes to a distribut-ing box and automatic sampler, from which the material is fed to two18-inch Caldecott cones. The overflow from cones goes to two 44-inchCaldecott cones, while the overflow from the latter flows to amalgamat-ing plates. The sands from 18-inch and 44-inch Caldecott cones flowto two 8-foot by 22-inch Ilardinge mills, which make 27 , thepebb
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
