of charcoal and hydrogen. 155 
subject at present admits, of the nature of the mixture ; and 
as this agreement between experiment and calculation was 
found to take place very nearly, in all the instances compre- 
hended in the two following Tables, we may consider the 
numbers composing them, as expressing, with sufficient ex- 
actness, the relative proportion of different gases in the re- 
sidues of oil and coal gas left by the action of chlorine. 
Table IV. Showing the composition of 100 volumes of the gas 
remaining after the action of chlorine on oil gas. 
Exp. 
Azote. 
Carb. Hydr. 
Carb. Oxide 
Hydr. Gas. 
Total. 
I 
7 
3 ° 
*5 
48 
IOO 
2 
5 
40 
15 
40 
IOO 
3 
S 
65 
20 
IO 
IOO 
4 
5 
75 
‘5 
5 
IOO 
Table V. Showing the composition of 100 volumes of the gas 
remaining after the action of chlorine on coal gas. 
Exp. 
Azote. 
Carb. Hydr. 
Carb. Oxide 
Hydr. Gas. 
Total. 
I 
M 
94-5 
4 
O 
IOO 
2 
6 
§2 
2 
10 
IOO 
3 
2 
66 
H 
18 
IOO 
4 
5 
60 
12 
2 3 
IOO 
5 
10 
20 
10 
60 
IOO 
It appears from the two foregoing Tables, that the portion 
of oil gas and coal gas, which is not condensible by chlorine, 
is in every case a mixed gas, consisting in most instances of 
carburetted hydrogen, carbonic oxide, and hydrogen, with a 
little azote, part of which may be traced to the impurity of 
the chlorine. In the best specimens of oil gas, the carbonic 
