THE EOYAL AETILLEEt INSTITUTION. 
393 
7738 cubic centims. of gas, the following scheme for the products of 
combustion of the. ordnance powder may be given :— 
Sulphate of potash .. 12*354 
Carbonate of potash.... 7*096 
Hyposulphite of potash.. O’605 
Charcoal . 0*887 
Sulphur... 0*397 
Sesquicarbonate of ammonia...... 0*908 
Nitrogen .. 3*432 
Carbonic acid . 7*442 
Carbonic oside... .. 0*504 
Hydrogen.. 0*047 
Sulphuretted hydrogen . 0*079 
Marsh-gas.. 0*167 
Loss .. 0*235 
34*163 
The results hitherto obtained for the products of combustion of both kinds 
of powder may now be compared with each other, and also with those 
obtained by Bunsen and Schischkoff in the analysis of sporting-powder:— 
Charcoal. 
I. 
Composition . 
Sporting- 
Small-arms 
Ordnance 
powder. 
powder. 
powder. 
Nitrate of potash ... 78*99 
77*15 
73*78 
Sulphur. 
. 9*84 
8*63 
12*80 
Carbon... 
. 7*69 
11*78 
10*88 
Hydrogen.... 
.. 0*41 
0*42 
0*38 
Oxygen. 
. 3*07 
1*79 
1*82 
.Ash .. 
.. 0*00 
0*28 
0*31 
100*00 
100*00 
100*00 
II. Gaseous Products of Combustion by Volume . 
Nitrogen .... 
35*33 
37*68 
Carbonic acid . 
. 52*67 
48*90 
42*74 
Carbonic oxide. 
. 3*88 
6*18 1 
10*19 
Hydrogen..... 
.. 1*21 
6*90 
5*93 
Sulphuretted hydrogen . 
.. 0*60 
„ 0*67 
0*86 
Oxygen........ 
Marsh-gas....... 
100*00 
3*02 
100*00 
2*70 
100*00 
III. Total Products of Combustion by Weight . 
Sulphate of potash..... 
42*27 
36*17 
36*95 
Carbonate of potash .. 
12*64 
20*78 
19*40 
Hyposulphite of potash ... 
Sulphide of potassium .. 
3*27 
2*13 
1*77 
2*85 
0*11 
Sulphoeyanide of potassium. 
0*30 
Nitrate of potash ... 
3*72 
Charcoal..... 
0 73 
2*60 
2*57 
Sulphur ... 
0*14 
1*16 
4*69 
Sesquicarbonate of ammonia . 
2*86 
2*66 
2*68 
Nitrogen..... 
9*98 
10*06 
9*77 
Carbonic acid.. 
20*12 
21*79 
17*39 
Carbonic oxide ... 
0*94 
1*47 
2*64 
Hydrogen ..... 
0*02 
0*14 
0*11 
Sulphuretted hydrogen. 
0*18 
0*23 
0*,27 
Oxygen .. 
0*14 
Marsh-gas . 
0*49 
0*40 
Loss. 
0*68 
0*19 
100*00 
100*00 
100*00 
Quantity of gas for a gramme of) 
powder.) 
190*00 
226*59 
200*91 
