. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. marble is very hard, running as high as 11 cubic feet per ton,which makes it especially valuable as a durable stone. A body ofmarble 1 mile long with a depth of 800 feet and width of 200 feet hasbeen developed, estimated at about 211,200,000 cubic feet. The stone is quarried in blocks weighing 380 tons each, accomplishedby cutting a vertical groove 10 feet deep around three sides, covering aspace of 420 square feet. Then channeled holes 6 inches apart, 6 feetlong, are
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. marble is very hard, running as high as 11 cubic feet per ton,which makes it especially valuable as a durable stone. A body ofmarble 1 mile long with a depth of 800 feet and width of 200 feet hasbeen developed, estimated at about 211,200,000 cubic feet. The stone is quarried in blocks weighing 380 tons each, accomplishedby cutting a vertical groove 10 feet deep around three sides, covering aspace of 420 square feet. Then channeled holes 6 inches apart, 6 feetlong, are drilled horizontally along the exposed vertical face on a linewith the bottom of the groove. Then plugged and feathered. Theblock is subdivided into sections weighing 15 tons, which are hoistedfrom pit by means of derricks, and placed on cars and transported tothe gangsaws. Equipment: There are 8 Merriam gangsaws. A 25 motor drivesthree gangs, and 8 Francis sand pumps elevate sand to distributors forsaws. A 360-cubic foot Ingersoll-Rand compressor furnishes air for 13—27278 170 MINES AND MINERAL TUOLUMNE COUNTY. 171
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
