Annual report of the State Mineralogist for the year ending ... (1883)
California State Mining Bureau · Sacramento : California State Mining Bureau · leaf 401
, and carriesalong by friction the surrounding air particles. In this way a currentis induced in the air pipe sufficient to ventilate the mine in a most sat-isfactory manner. The principle is the same which is used in the mercury air pump, thesteam injector, and the hydraulic elevator, and its… … Altitude 2,380 feet. Length of ore shoots 900 feet. Length of high-grade pay shoots 600 feet. Length of presentore shaft on incline _ 172 feet. Length of old north ore shaft on incline 500 feet. Vertical depth reached by present incline 90 feet. Character of hanging wall Syenite. Character of foot…
California State Mining Bureau · Mines and mineral resources · Gold mines and mining · Geology · Mineralogy
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