370 Chemical Examination of Bituminous Coal. 
c. Acetate of lead added gave no indication of sulphuretted « 
hydrogen. 
d. Sulphate of copper gave no indication of ammonia. 
e. The gas remaining in jar 1, after removal of carbonic acid 
gas, having been generated at the lowest temperature, burned 
with the clear, dense, yellow flame of olefiant gas. 
jf. The gas remaining in the other jars, after the removal of 
the carbonic acid gas, was entirely combustible, and burned 
with a flame resembling that of a mixture of carbonic oxide and 
light carburetted hydrogen. 
g. The volume of all ei gases of f and g was equal to 120 
cubic inches, or 2425 
Ratio of carbonic ei 80 cubic inches, 1600 patts: 2 
“ . combustible gases, 120 do. do. 2425 “ :3 
h. The coke of No. 1, was very light, jet black, shining and 
soft, and was not estimated because it was mixed with portions 
of iron from the interior of the bottle. 
The following samples were coked for two hours in a draft 
furnace, in covered Hessian crucibles. The coke was harder 
than in the process in the iron bottle. Its color was jet black 
internally, and gray at the top of the mass, where probably the 
air had slight access, and was about twice the bulk of the coal 
employed. 
The coke of 2 and 5 was burned ina platina capsule over a 
spirit argand lamp, till the carbon was all consumed. The results 
are as follows in the table, reduced to centesimal proportions. 
No.2. 63.5 grs.coalgave - - - - 83,8 coke. 
wee ee ie = fe: eo. 
A. 100. ‘“c ‘“ ba r pe 67.6 * 
5, 200. ‘gts. coal gave 128, 4b ge grs. which for3=64.2 “ 
2° Sy a 5 Sum Average 
54.76 F 56.1 | 110.86 | 55.43 
2 
By bABAL, ne 67-6)! 8.1 | 16.51 |: 8.25 
pea 37.63 32.4 | 35.9} 142.65 | 35.66 
a 8898" A ctl 100. ae 
Coke, per cent. | 68.17 62.36, 67.6 | 64.2 | 257.33 64.33 
an es 
