Appendix

 TABLE I. 
_Generator A Size_ (producing 1,000 cubic feet per hour): Anthracite to make gas at the rate of 1,000 s. d. cubic feet per hour=l2 lb x 9 working hours=l08 lb., or say, 1 cwt. at 20s. a ton.................................... 1 0 Allowance for wages of attendant......... 1 0 Repairs and depreciation of generator, gasholder, etc. (5 per cent. on £l25)= per working day........................ 0 5 Interest on capital outlay, ditto........ 0 5 ______
Total........................... 2 10 cub. ft.
Gas produced............................. 9.000 Less gas used for generating and superheating steam..................... 1,000 _____ Total effective gas for 2s. 10d. 8,000
Net cost 4¼ d. per 1,000 cubic feet.
TABLE II.
_Generator B Size_ (producing 1,500 cubic feet per hour) Anthracite to make gas at the rate of 1,500 s. d. cubic feet per hour=18 lb. x 9 working hours=162 lb., or, say, 1½ cwt. 20s. a ton.................................. 1 6 Allowance for wages of attendant......... 1 0 Repairs and depreciation of generator, gasholder, etc. (5 per cent, on £140) =per working day....................... 0 5½ Interest on capital outlay, ditto........ 0 5½ ___ ___ Total........................... 3 5 cub. ft. Gas produced............................. 13,500 Less gas used for generating and superheating steam..................... 1,200 ______ Total effective gas for 3s. 5d.. 12,300
Net cost 3 1/3d. per 1,000 cubic feet.
TABLE III.
_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 _______ Total......................... 4 11½
cub. ft. Gas produced........................... 22,500 Less gas used for generating and superheating steam................... 1,500 ______ Total effective gas for 4s. 11½d 21,000
Net cost, say, 2¾ d. per 1,000 cubic feet.