. mining and engineering journal. , additions have been made to the plant for the purposeof treating the oxidised ore above the 2nd level, which isnot amenable to the same treatment as the sulphide ore, andcrushing of this oxidised ore commenced in August last. Itis anticipated that the treatment, at the rate of 6,000 tonsmonthly, of the 177,793 tons of this class of ore estimatedto be in reserve will entail but a comparatively small addi-tion to the total working expenses, and that a profit of ton will be realised. It may be mentioned that theworking costs in October for the treat
. mining and engineering journal. , additions have been made to the plant for the purposeof treating the oxidised ore above the 2nd level, which isnot amenable to the same treatment as the sulphide ore, andcrushing of this oxidised ore commenced in August last. Itis anticipated that the treatment, at the rate of 6,000 tonsmonthly, of the 177,793 tons of this class of ore estimatedto be in reserve will entail but a comparatively small addi-tion to the total working expenses, and that a profit of ton will be realised. It may be mentioned that theworking costs in October for the treatment of 12,911 tons ofsulphide ore averaged 34s. 2^ per ton and for 0,175 tons ofoxidised ore 10s. ohd. per ton, or a general average cost of26s. 6id, on the 19,086 tons treated that month. During thesix months to December 31, 1915, 104,059 tons were treated,yielding 1,823 tons of blister copper, containing approxi-mately 1,795 tons of fine copper, 19,217 ozs. of gold, and35,844 ozs. of silver. The value of tliis output, taking copper. L *^or perhaps writing a fuU-iength story of the exploit,a to aopear In some popular magazine. Every Traveller ant) Soldier should carry the Sifcty typeWatermans Ideal. It should be his constant companion. Alwaysready to write, always in perfect working order Incomparablysut^crior to any other make of fountain types—RegiJar, Safety, and Lever Pocket Self-Filling. Of Sririiit-:-: • JeireHerx G. Sloan, ChclJcH Comer London, England. 184 THE SOUTH AFEICAN MINING JOURNAL. Johannesburg, May 20, 1916. at £75 per short ton of 2,000 lb., is estmiatecl at £218,920,against working expenses, say, £157,700, leaving an esti-mated profit of £61,220. Of this output a portion of thecopper has been realised at over £75 per ton, and it is antici-pated that the balance still unsold will yield a still higjiej\return. A working profit of £68,400 has Ijeen obtained fromthe operations to June 30. Against this, £28,160
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
