272 Gaseous Combinations of Hydrogen and Carbon. 
Hence 100 cubic inches of it would weigh 14°66 grains, 
and its specific gravity cannot exceed 0°4808. 
This is on the most unfavourable supposition, that no 
water whatever is formed during the first combustion. If 
water be formed, it 1s obviously lighter than we have made 
it. Tt is clear, therefore, that this new-formed gas, to 
which the name of oxycarbureted hydrogen may with pro- 
priety be given, is quite different from carbonic oxide gas, 
the specific gravity of which is 0°956, or almost double of 
our new gas. 
9°87 grains of olefiant gas are composed of 1:49 hydrogen. 
8°38 carbon. 
9°87 
Hence our oxycarbureted hydrogen gas } 1-49 hydrogen. 
i§ COMMPOSEN OF, Se ne. bss 3 aahs : 
: 5°33 carbon. 
5°31 oxygen. 
12°13 
Or per cent. Of carbon. i. iseeseesseeseecees 499 
. OXYGEN .. wees seececcrenneeve 43°8 
Hydtromen oo. eee cerswecsoes. Ea 
100°0 
It is not improbable that this oxycarbureted hydrogen 
gas is composed of an atom of carbon, an atom.of oxygen, 
and an atom of bydrogeu. If that supposition be well- 
founded, the proportion of oxygen must exceed a little 
what we have obtained by our analysis. This would pro- 
bably have been the case, if we had founded our analysis 
upon any of the succeeding experiments, rather than the 
first of the preceding table. 
The preceding experiments, I. flatter myself, entitle us to 
conclude, that éwo gaseous compounds of hydrogen and 
-earbon exist. To the first we may give the usual name of 
carbureted hydrogen; to the second the name of super- 
carbureted hydrogen, as*it contains, very nearly twice as 
much carbon as the first gas does. There exists also a 
gascous compound, consisting of oxygen, carbon, and hy- 
drogen 3 but it differs in its properties from all other in- 
. flammable gases hitherte examined. The reason why the 
inflammable gases from vegetable and animal substances 
differ so much from each other is, that they usually hold am 
oil in solution, and are mixed. with variable quantities: of 
carbonic oxide gas. 2 
XLVII.. On 
