. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. View of Pit of Columbia Marble Company, sbowing channelling machine in Gang-saws at Columbia Marl)le Companys Plant, sawing marble blocks. marble deposit is 200 feet wide, 500 feet deep and a mile long, andhas been estimated to contain over 200,000,000 cubic feet, being partof an immense deposit covering many square miles. The companyowns 160 acres. The channeling machines cut blocks of marble 16 by 12 feet. A rowof holes is then drilled horizontally along the bot
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. View of Pit of Columbia Marble Company, sbowing channelling machine in Gang-saws at Columbia Marl)le Companys Plant, sawing marble blocks. marble deposit is 200 feet wide, 500 feet deep and a mile long, andhas been estimated to contain over 200,000,000 cubic feet, being partof an immense deposit covering many square miles. The companyowns 160 acres. The channeling machines cut blocks of marble 16 by 12 feet. A rowof holes is then drilled horizontally along the bottom of the block which SACRAMENTO FIELD DIVISION * 53 is ])r()keii out hy wedges and feathers. Tlie large blocks are tlieu splitagaiji into pieces weighing about seven tons each, which are loaded byderrick and hoisted up the inclined track to the gangsaws, which are1100 feet distant and 250 feet above the quarry. The quarry equip-ment includes two channeling machines, two electrically operated der-ricks, two air compressors each operated by a electric motor,and air drills and shop. There are eight gangsaws, some wdth 25 saws each. These usesteel balls for sawing and cut at the rate of one
Size: 2084px × 1199px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, bookidappendixtojo, bookyear1853
