The structural and industrial materials of California (1906)
Aubury, Lewis E., b. 1862 · Sacramento, W.W. Shannon, Superintendent State printing · leaf 32
7,472 Besides this there was produced $1,388,901 worth of rubble andpaving blocks, which is nearly all of igneous rocks, mostly granite,witli some basalt, etc. *The Knox blasting system (patent) consists of drilling an oval-shaped liolo. elon-gated in the direction of tlie desired break, and… … ILL. No. 2. RAYMOND GRANITE QUARRY, MADERA COUNTY. Showing use of quarry bar.
Building stones · Portland cement · Clay · Mines and mineral resources
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