_Generator C Size_ (producing 2,500 cubic feet per hour):
Anthracite to make gas at the rate of 2,500 s. d.
cubic feet per hour=30 lb. x 9 working
hours=270 lb. at 20s. a ton............ 2 4½
Allowance for wages of attendant....... 1 6
Repairs and depreciation of generator,
gasholder, etc. (5 per cent, on £160)=
per working day...................... 0 6½
Interest on capital outlay, ditto...... 0 6½
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Total......................... 4 11½
cub. ft.
Gas produced........................... 22,500
Less gas used for generating and
superheating steam................... 1,500
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Total effective gas for 4s. 11½d 21,000
Net cost, say, 2¾ d. per 1,000 cubic feet.
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