The Mother Lode region of California . box effects a saving of from 12 to 15 tons per month, but it alsoresults in lowering the grade of concentrates. The economic result,however, has not been determined. No. 8 canvas is employed in thisplant, and lasts one year. Canvas for the complete plant costs $ wear and tear of the plant is stated to be about $25 per month; the 4—MB 50 CALIFORNIA STATE MINING BUREAU. -Groome & Hambric of Jackson, plant cost complete about $6, Argonaut Mine.—One mile north of Jackson, adjoining the Kennedyon the south. The inclined shaft commenced in 18
The Mother Lode region of California . box effects a saving of from 12 to 15 tons per month, but it alsoresults in lowering the grade of concentrates. The economic result,however, has not been determined. No. 8 canvas is employed in thisplant, and lasts one year. Canvas for the complete plant costs $ wear and tear of the plant is stated to be about $25 per month; the 4—MB 50 CALIFORNIA STATE MINING BUREAU. -Groome & Hambric of Jackson, plant cost complete about $6, Argonaut Mine.—One mile north of Jackson, adjoining the Kennedyon the south. The inclined shaft commenced in 1893 has now reacheda depth of 1750 feet, at which point it was stopped by an injunction ofthe court, pending a settlement of litigation with the Kennedy Com-pany. Above this level the mine has produced a large amount of ore,which has been crushed in a 40-stamp mill with large profit. Theshaft not being sunk on the vein, a series of raises have been driven,which prove this vein to be continuous from the surface croppings to ^/:. PoirsTED^ox Z&IL-A C)LI^\E:5 PL>^r«iTFig. 7. the lowest workings. The mine is equipped with a heavy hoistingplant, capable of working to a depth of 2000 feet. It is run by water,the power being communicated by means of rope transmission. Thelitigation between the Argonaut and Kennedy companies, in which theformer company is plaintiff, is still pending. The geology of theArgonaut, and of the Kennedy Mine adjoining, will be treated in aseparate paragraph following the description of the Kennedy Mine. There are 140 men employed. Argonaut Mining Company of San Francisco, owners. J. B. Francis of Jackson, superintendent. Argonaut Mill.—The rock is crushed in the breaker at the hoist anddelivered to the mill bins, from which it passes by chutes to Challenge THE MOTHER LODE REGION—AMADOR COUNTY. 51 feeders. The mill is in charge of Mr. B. Taylor. It has 40 stamps,which drop 7 inches, from 90 to 95 times per minute. No. 30 brass wirescreen is used. Th
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
