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.