66 
CAPTAIN NOBLE AND MB. E. A. ABEL ON EIKED GUNPOWDER. 
II. 
Volume. 
Tempe- 
Pressure. 
Volume corrected 
rature. 
for temperature 
o 
and pressure. 
4. Volume of original gas after absorp-] 
t 144-2 
14-2 
0-7293 
99-97 
tion of sulphuretted hydrogen .J 
s 
5. After absorption of C0 2 . . . 
. 82-2 
16-3 
0-6672 
51-76 
6. After absorption of oxygen . . 
. 80-6 
18-8 
0-6735 
50-79 
III. 
7. Portion of 3 transferred to eu-' 
i 174-8 
15-4 
0-1983 
32-81 
diometer J 
f 
8*. After addition of air .... 
. 248-4 
15-5 
0-2712 
63-75 
9. After addition of oxygen . . . 
. 319-5 
15-6 
0-3427 
103-58 
10. After explosion with oxyhydrogen' 
i 310-8 
15-8 
0-3302 
97-02 
gas J 
1 
1 1 . After absorption of C0 2 . . . 
. 291*6 
18-3 
0-3271 
89-39 
12. Portion of 11 transferred to clean. 
| 301-5 
18-6 
0-3141 
88-66 
eudiometer J 
13. After addition of hydrogen . . 
. 550-8 
18-9 
0-5642 
290-85 
14. After explosion (dry) .... 
. 416-0 
18-8 
0-4295 
167-16 
By calculation from the above data, the composition ^of this gas, 
in volumes per 
cent., was found to be as follows : — 
Carbonic anhydride 46T7 
Sulphuretted hydrogen 3' 91 
Oxygen 0'52 
Carbonic oxide 11’46 
Marsh-gas 0"03 
Hydrogen 2-72 
Nitrogen 35' 18 
The gas in each experiment was generally collected in three or four large tubes. 
The contents in one tube sufficed, in most instances, for the complete analysis ; but the 
results obtained were always controlled by determinations of several, if not of the 
whole, of the constituents in the contents of another tube. Only in one instance were 
the contents of different tubes, collected from one and the same experiment, found to 
differ materially in composition ; in this particular instance the proportion of sulphu- 
retted hydrogen in the different tubes was discordant. The mean of the results fur- 
nished by the contents of the three tubes was taken to represent the composition of 
the gas. 
* Air was added to dilute the gas in this and one or two subsequent explosion experiments ; but this precau- 
tion was found to be unnecessary, and was therefore not continued. 
