the Combustion of Gun-cotton and Gunpowder. 279 



The results hitherto obtained for the products of combustiou 

 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 : — 



I. Composition. 

 Sporting- 

 powder. 

 Nitrate of potash. 78-99 

 Sulphur . . . 9'84 

 f Carbon . . . 7-69 

 Hydrogen . . . 0*41 

 Oxygen . . . 307 

 I Ash 000 



10000 



Charcoal. 



Small- arms 



Ordnance 



powder. 



powder. 



77-15 



73-78 



8-63 



12-80 



11-78 



10-88 



0-42 



0-38 



1-79 



1-82 



0-28 



0-31 



100-00 



100-00 



n by Volume. 



35-33 



37-58 



48-90 



42-74 



5-18 



10-19 



6-90 



5-93 



0-67 



0-86 



Nitrogen 41*12 



Carbonic acid 52*67 



Carbonic oxide 3*88 



Hydrogen 1*21 



Sulphuretted hydrogen . . . I 0*60 



Oxygen 0*52 



Marsh-gas 3*02 2*70 



100-00 100*00 100*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 . . 3*27 1*77 2*85 



Sulphide of potassium . . . 2*13 .. O'll 

 Sulphocyanide of potassium . 0*30 

 Nitrate of potash .... 372 



Charcoal 073 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 



HXHX) 100-00 100*00 



Q TS^^^ l T ,ne '} 1 90•00 226*59 200-91 





