Scientific American Supplement, No. 388, June 9, 1883 by Various
page 53 of 156 (33%)
page 53 of 156 (33%)
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electrical car, drawing a second behind it, and hence providing for
the same number of passengers, consumed 18 lb. of coke per mile run. Hence, calculating the cost in the same way, for a distance run of 312 miles in a week-- £ s. d. Wages of stoker of stationary engine. 1 0 0 Coke, 52 cwt. at 25s. per ton. 2 15 0 Oil, 1 gallon at 3s. 1d. 0 3 1 Waste, 4 lb. at 2d. 0 0 8 Depreciation on stationary engine, 10 per cent. } on £300 11s. 6d. } Depreciation of electrical apparatus, 15 per cent. } 2 0 4 on £500, £1 8s. 10d. } --------- Total. £5 19 1 A saving of over 25 per cent. The total mileage run is very small, on account of the light traffic early in the year. Heavier traffic will tell very much in favor of the electric car, as the loss due to leakage will be a much smaller proportion of the total power developed. It will be observed that the cost of the tramway engines is very much in excess of what is usual on other lines, but this is entirely accounted for by the high price of coke, and the exceedingly difficult nature of the line to work, on account of the curves and gradients. These causes send up the cost of electrical working in the same ratio, hence the comparison is valid as between the steam and electricity, |
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