ANALYSIS OF OLEFIANT CAS. ^^ 



the corresponding \ve">ght, we find, that 100 parts by 

 weight of dry oieMunt gas contain 



Carbon .»..••■..•.... •• 84*78 



Hidrogen .13'55 



98-33 



The sum of these products represents very nearly the 

 weight of the olefiaut gas, that I had subjected to any.- 

 lysis: the difference of a hundredth and half may be as- 

 spribed to errour of observation, or indeed to the small 

 quantity of inflammable gas, that escaped combustion. 

 Hence it follows, that the olefiant gas does not t-'ontain j^ ^.^^^j^jj^g ^^ 

 any observable quantity of oxigen, that it is composed of oxigen. 

 hidrogen and carbon, and that it should be termed carbu- 

 ret ted hidrogen. 



Olefiant gas appeared to me to vary a little in its weight Varies a little 

 and composition, according to the mode in which it was ^^^^^ j" '^^ 

 prepared. When the distillation of the alcohol and sul- preparation. 

 phuric acid is carried too far, the gas obtained after the se^ 

 paration of the sulphurous acid is a trifle lighter, and con- 

 tains a little oxigen. In my experiments, however, this 

 oxigen never exceeded the four-hundredth part of the gas. 



In the processes which I conducted so, that there was The difference 

 no oxigen in the olefiant gas, I did not always find it •'''f^"^g> ^heu 

 precisely of the same gravity, or with the same proportion nated with 

 of hidrogen and carbon ; but the dirterence amounted only ^'xigen. 

 to two or three hundredths, and consequently was not alto- 

 gether independent of errours of observation. In the ex- He-jTiest equal 

 periment, in which I obtained olefiant gas of the greatest fo atmospheric 

 epecific gravity and most loaded with carbon, its weight was 

 precisely that of atmosnhpric air. The litre [2*1 pints] of 

 this dry gas weighed ]-228 gr, [l8-9(>7^'^]» ^t 7G [29'8 in.] 

 pressure, and 12*5° [54-5° F.] temperature, 100 parts of this 

 gas, mixed with 500 of oxigen, were reduced by detona- 

 tion to 402; which contained 208 of acid gas, and 194 

 of oxigen; not mentioning the 12 parts of nitrogen mixed 

 with the oxigen, which were found, to about a hundi-edth, 

 in the residuum of the process. 100 parts of olefiant gas 

 by weight therefore consumed 30^ parts of oxigen gas, and 



formed 



