SSS Mr Anderson on the Itlummaiing Power Coal-Gas. 
IRON-WOEE,' &c. 
L. 
s. 
h 
S Retorts, with condensing main, &c. 
- 186 
16 
0 
Tar condenser, &c. - - - - 
81 
16 
0 
Purifying apparatus. See. . - , 
86 
1 
0 
2 Gasometers, with chains, pulleys, and counterpoise, 
397 
7 
0 
397^^ yards of main -pipes, from 4^ in. to 1| in. diameter, 
- 965 
14 
0 
Jointing and laying pipes, ^c. , - 
- 397 
16 
0 
Bend-pipes, traps, &c. - _ . 
50 
0 
0 
4000 yards of service -pipes, - - - 
- 200 
0 
0 
Iron-pillars for street-lights, - - - 
64 
0 
0 
2 Workmen for 8 months at 21s. per week. 
64 
0 
0 
Contingencies, including salary of engineer, &c. - 
- 300 
0 
0 
L. 2783 
10 
0 
From this statement, it appears that the total outlay upon the 
eoal-gas manufactory referred to, would amount to L. 4063, 10s. 
Supposing only half the number of retorts belonging to the es- 
tablishment to be in actual use at a time, the whole weight of 
coal they would decompose, in 24 hours, would be If tons, and 
the quantity of gas they would produce 14,400 cubic feet. This 
volume of gas would, in the depth of winter, (when the lights 
were used, at an average, six hours daily), afford a sufficient 
supply to the following burners : 
Hourly consumpt of 
Equal light 
gas, in cubic feet. 
with candles.' 
300 No. 1. Argands, 10 holes, 
650 
3000 
100 No. 2. do. 14 
280 
1200 
50 No. 3. do. 18 
150 
750 
180 Batwings, 
400 
2160 
150 Jets, with 3 holes. 
280 
900 
200 do. 2 
300 
800 
400 do. 1 
300 
900 
I380‘ 
2360 
6 
9710 
Daily consumpt, 14160 cubic feeb 
The quantity of coal carbonised daily to supply gas to burn- 
ers of the above description, in the depth of winter, being only 
1 1 ton, the whole quantity of coal used in the course of a year 
would not exceed 250 tons ; and as the coke from the retorts 
would do more than supply fuel, it is unnecessary to make any 
allowance for it. 
It now remains to give a view of the probable return that 
