75 On Oil and Oil-gas. 
No. 3. 100 Measures, gave 97 carb. acid—took 181 oxygen: 
10 Superolefiant 38 — 70 
hesi - oe —_—_ se 
Consisted of 79} esid, comb, 59 lll 
I oxygen 
16 azote 
No. 4. 100 Measures, gave 97 carb. acid—took 172 oxygen. 
20 Superolefiant 56 977 —_——— 
Consisted of = 7! Resid. comb. -—— 41 — 56 —— 
9 Azote 
On comparing these results, there is found 
avery considerable difference in them with 
regard to the proportions of carbonic acid 
and oxygen due to the superolefiant gas. The 
carbonic acid produced is from 3 to 4 times 
the volume of the gas, and the oxygen ex- 
pended is from 5 to 7 times the volume. 
These differences are partly due no doubt to 
inaccuracies in such complex experiments ; 
but I am persuaded they cannot all be ascri- 
bed to that cause. If we were to average the 
~ results, the proportions would be nearly 100 
measures, for 300 carbonic acid, and for 500 
oxygen. In order to form a gas of this cha- 
racter it would only be required to combine 
an atom of olefiant gas with 1 of carburetted 
hydrogen, and to condense them both into the 
space of 1 atom of olefiant gas. 
Another supposition might be made, of two 
atoms of olefiant gas united and comprised in 
the space of one. In this case, 100 measures 
would give 400 carbonic acid and require 600 
