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Experiments on the Gas from Coal. 403 
TABLE IV. 
Comparative Table of the Qualities of the Gases from 
Wogan Cannel, and from common Coal, at equal times 
from the Commencement of the Distillation. 
Oxygen consumed Oxygen consumed by 
by 100 m. can- 100 m. of Clifton 
nel gas. coal gas. 
L hour's gas...+1.220...scecvee sereererereeel 64 
DP OES ils 1054s dB Ocsneeqsednancerasoreses 16S 
5 NOUS ..cccevecee DOG. cccceveececers L cike ocak ee 
7 TOULS, s.ceacan see 200....006 Mivaptsdaueeceos .140 
QD HOUTS ..rcccceesed T6.ceee cevescsscereceeces 
TL] Hours ..4..0002L5Qssesseeeceeseseeeeee see 106 
It appears from these experiments, that 
the gas from cannel has, in an equal volume, 
an illuminating power about one third greater 
than that from coal of medium quality. The 
quantity, also, from the former substance, ex- 
ceeded by about oneseventh that obtained from 
coal, distilled under precisely similar circum- 
stances; 3500 cubic feet of gas having been 
collected from 1120 pounds of cannel, and 
only 3000 cubic feet from the same quantity 
of coal. The whole product of one distilla- 
tion of cannel, mixed together in a gazo- 
meter, was of such quality, that 100 mea- 
sures required for combustion 155 measures 
of exygen gas, and gave 88 measures of 
carbonic acid. But as the gas was contami- 
