and engineering journal . orks and (top left hand picture) New Buildings and Equipment ofthe Randfontein South Vertical Shaft. A very satisfactory report for the September quarter was issued this week, show-ing that the quantity of ore crushed during the quarter was 19,500 tons more than during the preceding three revenue was 1s. 9d. per ton higher, and the working costs 1s. 3d. per ton lower, with the result that the working profitfor the quarter amounted to £112,699, an increase of £61,818 over the quarter ended 30th June. The development footagesampled totalled 7,560 fe
and engineering journal . orks and (top left hand picture) New Buildings and Equipment ofthe Randfontein South Vertical Shaft. A very satisfactory report for the September quarter was issued this week, show-ing that the quantity of ore crushed during the quarter was 19,500 tons more than during the preceding three revenue was 1s. 9d. per ton higher, and the working costs 1s. 3d. per ton lower, with the result that the working profitfor the quarter amounted to £112,699, an increase of £61,818 over the quarter ended 30th June. The development footagesampled totalled 7,560 feet, and gave the following results: Payable. feet, having an average value of 15 inches of reef. Unpayable, 1,720 feet, having an average value of dwts. over 14 inches. 272 THE MINING AND ENGINEERING JOURNAL. Jburg, October 29, 1921. SIEMENS BROTHERS AND COMPANY, LIMITED. MAGNETO MINING TELEPHONES Hermetically sealedDIAPHRAGM behind extrastrong GRID. Gold platedDIAPHRAGM. Very strong Dampproof Closed. DampDustDEFIES i Inflammable GasRough usageNoise Powerful (1600 Ohm) Watertight SIEMENS BELL. Very powerful handGENERATOR. Bare, tinned, copperinternal CONNEC-TIONS. Loud speakingRECEIVER CORD speciallyreinforced here Highest quality dry-cells.
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
