ON LIQUID FUEL. 
553 
Furnace gas. 
Quantities of 
heat in 
furnace gas. 
Equivalent evaporation 
of water. 
at 212° 
O 
O 
1 
* 
lbs. 
Heat units. 
lbs. 
lbs. 
Carbonic acid gas .... 
3TG 
411 
Water-vapour. 
1-26 
359 
Nitrogen gas. 
11-45 
1,683 
Surplus air. 
14-37 
2,124 
2;2 
30-74 
4,577 
4-8 
Total heat of combustion . . 
21,154 
Latent heat of water-vapour . 
1,217 
1-3 
Available heat. 
19,937 
Waste heat of furnace gas 
4,577 
4-8 
Effective heat. 
15,360 
15-8 
13-6 
Theoretical evaporative power 
• • • • • 
... 
21-9 
Relative evaporative efficacy 
as compared with carbon or coal = l . . 
1-39 
One pound of hydrocarbon, containing 25 per cent, of hydrogen, yields about 36 
pounds of furnace gas, containing :— 
Quantities. 
Quantities of 
heat in 
furnace gas. 
Equivalent evaporation 
of water. 
at 212° 
at 60° 
lbs. 
Heat units. 
lbs. 
lbs. 
Carbonic acid gas .... 
2-75 
358 
Water-vapour. 
2-25 
641 
Nitrogen gas. 
13-39 
1,968 
Surplus air. 
17*39 
2,483 
2-6 
35-78 
5,450 
5-6 
Total heat of combustion . . 
26,283 
Latent heat of vapour . . . 
2,174 
2-2 
Available heat. 
24,109 
Waste heat of furnace gas 
• • • • • 
5,450 
5-6 
Effective heat. 
18,659 
19-3 
16-6 
Theoretical evaporative power 
• • • • • 
... 
27-1 
Relative evaporative efficacy as compared with carbon or coal*=l . . . 1"69 
The use of this oil as fuel presents great advantages for gas-tar distillers, with whom 
it is a troublesome waste product. If it should come into demand as steam-fuel its 
value would of course rise above that of coal, to an extent proportionate to its greater 
