eee eS 
Miscellaneous Intelligence. 299 
Carbonic acid. Heat. 
Manchester gas, - . 4:0 cubic feet 32 
London gas, A, - - PD ees ihe 22 
Boghead hydrocarbon gas, bE py: 19 
Lesmahago hydrocarbon gas, Tog 19 
use of gas, and in a sanatory point of view, the high position which, as 
an illuminating agent, coal-gas of e 
in dwelling houses is still extensively objected to. e objections are 
partly well founded and partly groundless. As is evident from the 
foregoing table, even the worst London gases produce, for a given 
dles. But then, where gas is used, the consumer Is never satisfied with 
a light equal in brilliancy only to that of lamps or candles, and conse- 
“quently, when three or four times the amount of Jight is produced from 
a gas of bad composition, the heat and atmospheric deterioration great- 
ed, it is evident that 
es am 
three or four times the light may be employed, with the production of 
he formation of sulphurous acid can readily be proved and even its 
amount estimated, by passing the products of combustion of a jet of 
