392 
MINUTES OF PROCEEDINGS OF 
(b) Small-arms Powder . 
34*153 grms. were used for the combustion. The quantity of the gaseous 
products was obtained from the following gasometric experiments:— 
Absorption Analysis. 
Vol. at 0° 
and 1 metre 
Volume. Pressure. Temp, pressure. 
Original volume. 136*94 0*6331 22*1 80*21 
After absorbing CO 2 and SH . 75*04 0*5024 21*9 40*46 
If the solution of the potash-bulb is determined with solution of iodine, it 
is found that 0*535 division corresponds to sulphuretted hydrogen, from 
which it follows that the above quantity of gas consists of— 
Carbonic acid ... 
Sulphuretted hydrogen ............ 
Combustible gases and nitrogen.. 
39*22 
0*53 
40*46 
80*21 
The explosion analysis with the transferred gas gave— 
Vol. at o° 
and 1 metre 
Volume. Pressure. Temp, pressure. 
Original volume. 
0*3432 
20*4 
38*36 
After addition of air . 
.. 198*51 
0*4263 
20*3 
78*77 
After addition of oxygen. 
. 230*33 
0*4478 
20*5 
95*89 
After explosion . 
. 201*14 
0*4323 
19*6 
81*47 
After absorption of CO 2 . 
. 189*46 
0*4276 
21*0 
75*23 
After addition of H . 
. 261*02 
0*4817 
21*2 
116*66 
After explosion .... 
0*4130 
18*3 
67*43 
If the formulae previously used be applied, we get 
Carbonic acid = 3*95, Marsh-gas = 2*29, 
Hydrogen = 5*24, and Nitrogen = 26*88. 
Hence the small-arms powder contains in 100 volumes— 
Carbonic acid .. 48*90 
Sulphuretted hydrogen. 0*67 
Carbonic oxide .. 5*18 
Marsh-gas .. 3*02 
Hydrogen. 6*90 
Nitrogen . 35*33 
100*00 
The solid residue in the mortar was treated with hot water and the liquid 
filtered. No sulphide of potassium was found to be present. The analysis 
was executed in the same manner as with the ordnance powder. 
From the results of this analysis and from those of the gas-analysis, direct 
measurement having shown that 34*153 grms. of ordnance powder give 
