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Report of the Mining Industry Commission

Report of the Mining Industry Commission


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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ... a conservative estimate, as Mr. Petersen has for months been able to obtain an average of nine holes per machine shift from the small drills which he has been using. In the comparison which follows we take nine holes per machine shift as the duty Evidcnce---p. 1,554. qq. 21.837, 21,992. of a small drill on the coloured labour basis. Report. Immediate effect upon working costs of the white labour policy. Number of small machine drills per white miner as affecting working cost. 544. Mr. Petersen's figures for cost of labour, air, maintenance, oil, and hoses for runnmg four machmes one shift on the coloured labour basis were: --545. These being the only figures available based on actual experience we adopt them as the cost of running small drills with coloured labour. 546. The drilling of eight holes a shift would not, other things being equal, cost as much in air, maintenance, etc., as the drilling of nine holes, but in our comparative figures below we debit the white miner drilling eight holes with the same cost for air, maintenance, oil, and hoses per machine shift as Mr. Petersen gives for drilling nine holes on the coloured labour basis. 547. Professor Yates was of opinion that holes drilled by small machine drills would not, as a rule, be so effectively placed as those drilled by hand. He estimated that eight holes put in by a small drill would only break as much rock as seven hand holes, while the cost in explosives, drill steel, and drill sharpening would be greater with small drills than with hand labour. 548. Mr. Petersen considered that the cost would be about the same in both cases, and omits such items from his comparison of the cost of his small machine work with that of hand labour. We are of opinion that Mr. Petersen...


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Product Details
  • ISBN-13: 9781230098050
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 86
  • Spine Width: 5 mm
  • Width: 189 mm
  • ISBN-10: 1230098054
  • Publisher Date: 13 Sep 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 168 gr


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