Mining Costs of the World a Compilation of Cost And Other Important Data On the

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Mining Costs of the World a Compilation of Cost And Other Important Data On the
Edmond Norton Skinner
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10. Od. 5, 082 5s. 9. Id.
Grade ore reserves 20s to 22s Remarks. Company operates on the Main and South Reefs. The average stoping width for 1912 was 44 in. Property is equipped with a 90- stamp mill and cyanide plant.
TRANSVAAL 255 EAST RAND PROPRIETARY MINES, LTD.
TRANSVAAL, SOUTH AFRICA Year Ended Dec. 31 1912 1911 1910 Gold, ounces Gross revenue Expenses 705, 325 2, 967, 443 1, 928, 350 664, 304 2, 784, 882 1, 828, 261 691, 860 2, 900, 883 1, 651, 527 Working profit 1, 039, 093 956, 621 1,
...249, 356 Total profit after accul 1 076 746 974 516 Ore received from mine Per cent, waste sorted out Mill: Tons crushed Stamp duty, tons 24 hr No. Stamps operating 2, 054, 507 10 1, 848, 050 7. 39 820 25 2, 354, 336 7 2, 194, 552 8. 23 820 25 2, 334, 907 8. 7 2, 126, 334 6. 78 820 Value ore treated, dwt Yield, ounces .
7. 991 424, 945 6. 579 366, 787 7. 008 373, 407 Yield per ton, dwt 4 . 599 3. 343 3. 512 57 5 50 11 Cyanide : Tons treated 1 846 275 i Assay value, dwt Yield, ounces 3. 392 280 380 3.


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