274 M. L. v. Karolyi on the Products of 



For the qualitative analysis of the products of combustion, two 

 cylinders were filled with the two kinds of powder, made air- 

 tight, and successively exploded in the mortar in the manner 

 described. 



For both kinds there were found in the solid residue : — (1) 

 sulphate of potash, (2) carbonate of potash, (3) hyposulphite 

 of potash, (4) sesquicarbonate of ammonia, (5) sulphur, (6) 

 charcoal, (7) sulphide of potassium. The latter, in the case of 

 the small-arms powder, was only formed in very small quan- 

 tities. 



The gaseous products of combustion were (1) nitrogen, (2) 

 carbonic acid, (3) carbonic oxide, (4) hydrogen, (5) sulphuretted 

 hydrogen, (6) marsh-gas, and a very small quantity of a bisul- 

 phide of carbon compound, which was distinctly recognized by 

 its odour as being that produced in the gases from gun-cot- 

 ton. The whole mixture is colourless, and contains no fume or 

 vapour. 



(a) Ordnance Powder. 



For the quantitative determination of the products of combus- 

 tion, 36*8366 grms. were used. 



The gas passed into three absorption-tubes amounted to 

 75*3 cubic centims.; the gas issuing from the mortar until the 

 rest was under the atmospheric pressure amounted to 5480*7 

 cubic centims. at 16° C. and 0*749 metre pressure; under these 

 circumstances the mortar holds 5216 cubic centims.; hence the 

 above quantity yielded 7621*96 cubic centims. gas at 0° and 

 1 metre pressure. 



The absorption-analysis produced — Vol. at 0° 











and 1 m. 





Volume. 



Pressure. 



Temp. 



pressure. 



Original volume .... 



90*72 



0*6028 



16*2 



51*63 



After absorption of C0 2 H 

 and HS . . . . J ' 



53*71 



0*5705 



14*3 



29*12 



From the estimation of the potash-bulb with iodine solution, it 

 followed that the sulphuretted hydrogen corresponded to 0*44 

 division. Hence the above gas consisted of 0*44 vol. sulphu- 

 retted hydrogen, 22*07 carbonic acid, and of 29*12 nitrogen and 

 combustible gases. 



The explosion-analysis of the gas freed from sulphuretted 

 hydrogen and carbonic acid and transferred to the eudiometer, 

 was as follows : — 



