COMPOSITION or SULPHURIC ETHKK. 



results ^ve have just obtained from the detonation of riio 



oxicarburetted hidrogen gas of ethei-j we find, that 100 

 parts by weight of the latter contain, 



Carbon - . _ 56-12 



Hidrogen ... 17-43 



Oxigeu - - - 26-45 



100. 



Fthcr contains The analysis of this gas compared with that of alcohol 



more carbon jg sufficient to give US some idea of the composition of ether, 



and hidrogen, '^ . 



but less oxigen, and show US, that this liquor contains in an equal wciight 



than alcohol, more carbon and hidrogen, but less oxigen, than alcohol; 

 for this oxicarburetted hidrogen g'as alone constitutes more 

 than three fourths of the weight of the ether I decomposed. 

 The other fourth, which I pass by, is alraost wholly oil, in 

 part fixed, in part volatile, which must have some similarity 

 of composition with the ether. But as oil, according to the 

 analysis of Lavoisier., contains scarcely any thing but car- 

 bon and hidrogen, it follows, that, in referring the com. 

 position of ether to the proportions of the elements of the 

 gas I have just analysed, we have too little hidrogen and 

 carbon, and too much oxigen. This will be confirmed by 

 the following process, which gives more precise results. 



Sect. VIII. Analijsii; of Efher by the Detonation of its 

 Elastic Vapour. 



Vapour of ^^^ *^6 preparation of the oxigen gas dilated by the va, 



ether detonated pour of cther, and the estimation of the weight of tliis va- 

 pour, I adopted the same processes as those I applied to 

 the vapour of alcohol, § III. I think it useless tlicrefore 

 to repeat them ; but I shall give one example of their re- 

 suits, the barometer being at 27 inches, and the thermome- 

 ter at 18'^ [72-5° F.]. Of five experiments made in a si- 

 milar %vay this appeared to me the most accurate, though 

 their differences were slight. 

 Txpansion of "^^^ elastic force of my ether, or the depression of the 

 the vapour. column of mercury by a drop of this fluid introduced into 

 its vacuum, was 16 inches 9 lines. On applying to this re- 



P 



s^lt the formula of Dalton — — , we find, that a volume of 



P~J 



air 



with oxigen 



gas 



