QV THE COMPOSITION OF ALCOHQL. 271 



Carbon ••• 94:5'59 Its constituent 



Oxigen 485-59 '"""^'"- 



Hidrogen 278*65 



Nitrogen 76'77 



1786-61* 



To come at the whole of the carbon contained in the Carbon in the 

 2180-5 grs. of alcohol I decomposed, we must add to the ^^*^^^'^'' 

 ^■if5'59 grs. of carbon in the inflammable gas the 3| grs. 

 from the charcoal found in the porcelain tube, and that of 4 

 grs. of oil which might amount to about 3 grs. These added 

 together make 951 S-i; and thus 100 partsof alcohol contain 

 4t3'65 of carbon. 



To find all the oxigen of the alcohol, we must add to the Oxigen in the 

 285 "59 grs. of oxigen belonging to the inflammable gas the ^'<^®^°^' 

 oxigen of 193 '5 grs. of water in the receiver adapted to the 

 worm. Thus the sum of oxigen was equal to 485*59+ 170*28 

 rz655*87 grs. From 100 parts of alcohol therefore we should 

 have 30' 12 of oxigen. 



To obtain the whole of the hidrogen of 2180*5 grs. of alco- Hidrogen ia 

 hoi, we must add to the 278-66 of hidrogen found in the oxi- ^^® alcohol, 

 carburetted hidrogen gas the hidrogen of the 193*5 grs. of 

 water collected in the receiver, and the hidrogen of 4 grs. of 

 oil, which might be about 1 grainf. The sum of these is 

 302*88 grs. ; so that 100 parts of alcohol would have furnished 

 13*89 gi's. of hidrogen. 



Adding to these elements the quantity of nitrogen I found Nitrogen and 

 in the inflammable gas, and lastly that of the ashes obtained ashes. 



• This gas therefore contains in 100 parts by weight. 



Carbon 52-9 



Oxigen 27-2 



Hidiogen 15'6 



Nitrogen 4 3 



100. 



•f- This oii does not make the five hundredth part of the weight of the 

 alcohol I decomposed : so that in the present analysis, which is meralf 

 jn approximation, I might have neglected this product; and there- 

 fore it is of Utile consequence, whether the composition.! ascribe to it 

 be just. 



by 



