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Show Calitornia and Australian Gold Yield Compared. In compa;-ing compa;-ing the average of the quartz rock crushed in Australia with that of California Cali-fornia some very important facts present themselves to our view, and claim our most serious attention. The average yield of Australian quartz mines does not exceed the minimum yield of our own workable ledges Ten dollars per ton is the average of all the quartz raised and crushed in that country, but rock yielding less than that here, can not be worked at present. Extensive Exten-sive gold bearing quartz lands, which will yield from 3 to 9 dollars per ton, exist in many parts of the State, and in the great auriferous belt of Maripo-sa, Maripo-sa, Calaveras, and Nevada, but re-maiu re-maiu unworked, while we fi'id ledges in Australia profitably worked, yielding yield-ing only two dollars per ton for example: ex-ample: From 7,453 tons, of 2.240 pounds to the ton, of quartz obtaim d from a quartz mine in Ball irat, the yield per ton amounted to two dollars, and yet a dividend of 10.500 dollars was declared. The total cost of raising rais-ing the rock from the mine, crushing, extracting gold, wear and tear of machinery, and loss of mercury, was estimated at 1,30 per ton. The St John del Bey Mine in Brazil Bra-zil has been profitably worked since 1S30, and continues to give a handsome hand-some profit to its owners, with a yield of no more than a quarter of an ounce of gold to the ton of 2.240 pounds; and the quartz mines of Hungary are profitably worked, with a yield ol only one-eighth of an ounce." The reason why ledges of such low grades are worked profitably in other countries and remain idle in our own is evident. California labor is dearer than in any ol the other countries, excepting the inhospitable region of Cariboo, British Columbia. Laborers receive S2 a day in Australia, and receive ?3 in this State, Hnd all others are employed at a corresponding rate. Added to this is the fact that the Australian miners take the precaution to know the exact amount of'gold contained in the quartz piior to crushing it. with the amount remaining in the tailings after crushing; the particularity and minuteness of the details in the various apparatus used for saving1 the gold, which is much neglected by Californians; and the employment of the- cheaper labor of machinery, where practicable, instead of manual labor, as in the case of self-acting self-acting aprons for feeding the si amps from the hoppers, which is done by hand in this tate. Such we believe to be the true cause of the difference in the minimum quality of the ores crushed in the two countries. From "Ghl and. Gold M'liing," in Over-bind Over-bind Monthly for June. |