On Oil, and Oil-gas. 74 
different specimens were not alike: No. 1, 
was chiefly carburetted hydrogen; No. 2, 
contained carburetted hydrogen and carbonic 
oxide ; No, 3, consisted chiefly of carburetted 
hydrogen; and No. 4, contained carburetted 
hydrogen, carbonic oxide and hydrogen; as 
will be obvious from the results of their ana- 
lyses exhibited below. ‘The atialyses were 
effected in this way: One hindred measures 
of the washed gas were fired with the due 
proportion of oxygen, over mercury, and 
the acid and oxygen determined in the usual 
way: next 100 measures of the same gas 
were treated with oxymuriatic acid to take 
out the superolefiant gas; the excess of acid 
being washed out, the residue was fired and 
the carbonic acid and oxygen determined; 
these were then subtracted from the results of 
acid and oxygen for 100 gas, and the remain- 
ders were put down as due to the combustion 
of the superolefiant gas. 
No. I. 100 Measures, gave 185 carb. acid—iook 310 ‘oxygen. 
- 46 Superolefiant — 141 220 - 
Consisted of < 50 Residuecomb— 44 — yo —— 
4 Azote 
No. 2, 100 Measures, gave 119 carb. acid—took 190 oxygen. 
16 Superclefiant— 60 — 109 
56 Resid. comb. — 59 — sl 
3 oxy. 
25 azote 
Consisted of 
