1898 - Coalmininghistorypa.org

186 REPORT OF THE BUREAU OF MINES.Off. Doc.Operating Expenses, Mule Powei*.Per Year of 180 WorkingDays.Third Level.Depreciation and interest on 15 mules, at 16 per cent, life time estiniated at 10 years is equal to 10 per cent, of first costFeed, harness, attendance, etc., 15 mules at 30 cents dayThree drivers at ^.70 day,Three patchers at 11.33 dayTotalFourth Level.Depreciation and interest on 12 mules at 16 per centFeed, harness, attendance, etc., 12 mules at 30 cents day,Four drivers at $1.70 dayFour patchers at $1.33 day,Tota 1$1 479 125 103 99$19 6S$1 177 306 805 32120 59$264 001,642 50918 00718 203,542 70$211 201,314 001,224 00957 60$3,706 80Total both levels, .,$40 27$7,249 50Operating Expenses, Compressed Air Liocomotives.Per Year of ISO WorkingDays.Interest on plant, 6 per centDepreciation, repairs and renewals, 5 per centSteam for compressor, about 100 H. P., at 1.8, including- coal, labor,interest and depreciation on boiler plant, etcCompressor engineer (n'achine is in hoisting engine house, no extrapay to engineer)Compressor, oil,Locomotives, oilTwo locomotives engineers, at $1.66 dayFour locomotives patchers, at $1.33 dayTotal both levels.$4 563 7816253 325 32$19 19$820 41681 8728 8045 00597 60957 60$3,455 28One-half to each level,$9 59$1,727 64Total cost of plant, $13,678.48.