CAPTAIN NOBLE AND ME. E. A. ABEL ON EIEED GUNPOWDER, 
101 
Table VII. — Showing the specific heats and proportions of the products generated by 
the combustion of gunpowder. 
1. 
Products of combustion. 
Proportion' 
in a 
gramme. 
3. 
Specific 
heat. 
4. 
Authority. 
Products of 
columns 2 & 3. 
Solid *5684. 
Potassium carbonate 
•3382 
•206 
Kopp. 
•06967 
„ hyposulphite 
•0355 
•197 
Pape. 
•00700 
„ sulphate 
•0882 
•196 
Kopp. 
•01729 
„ sulphide 
•0630 
•108 
Bunsen. 
•00680 
„ sulphocyanate 
„ nitrate 
•0009 
•0006 ! 
•239 
Kopp. 
•00014 
Ammonia carbonate 
Sulphur 
•0006 
•0414 
•171 
Bunsen. 
•00708 
Carbon 
•0000 
•242 
Regnault. 
Gaseous - 4316. 
Sulphuretted hydrogen 
•0113 
[At constant 
volume. 
•184 
Clausius. 
•00208 
Oxygen 
•0000 
•155 
Carbonic oxide 
•0447 
•174 
„ 
•00778 
Carbonic anhydride 
•2628 
•172 
•04520 
Marsh-gas 
•0005 
•468 
„ 
•00024 
Hydrogen 
•0010 
2-411 
„ 
•00241 
Nitrogen 
•1113 
•173 
” 
•01925 
1 
•18494 
Adding up the numbers in column 5, we obtain T8494 as the mean specific heat of 
the products of explosion of a gramme of powder at ordinary temperatures ; and since, 
as we have said, the temperature of explosion is obtained by dividing the gramme-units of 
heat by the specific heat, we have the temperature of explosion=. I || i =3812 0 C. ; and we 
may accept this figure as indicating a temperature which is certainly not attained by 
the explosion of gunpowder. We defer until further on the consideration of the 
actual temperature. 
M. DETERMINATION OE VOLUME OE SOLID PRODUCTS AT ORDINARY TEMPERATURES. 
The space occupied by the solid products of combustion at temperatures but little 
removed from 0° is deduced from experiments Nos. 46, 48, 49, 57, 58, 60, 61, and 62. 
From these experiments it appears that 
246-29 grms. R. L. G. gave rise to 76-46 cub. centims. solid residue. 
33 
33 
F. G. 
„ 67-26 
33 
33 
393-98 
33 
R. L. G. 
„ 123-12 
33 
33 
386-21 
33 
F. G. 
„ 115-34 
33 
33 
33 
R. L. G. 
' „ 110-81 
33 
33 
33 
P. 
„ 111-78 
33 
33 
33 
33 
R. L. G. 
„ 105-30 
33 
3 3 
33 
„ 
F.G. 
„ 108-54 
33 
33 
