g5S» ®^ '^^ COMPOSITION OF ALCOHOL. 



tion, and while it was full of fumes, these were perfectly 

 void of smell. 

 Calculation of xhe 500 parts of alcoholized oxipren ^as contairjed before 

 the products. . , 5 ,• . .1 • ' r i u v 



. the combustion, according to the expansion ot alcohohc va- 



pour, only 468*07 parts of oxigen. The alcoholic vapour 

 therefore and hidrogen gas added occasioned the disappear- 

 ance of 468'07 — 342*59 = 125*48 parts of oxigen gas. Th^ 

 liidrogen gas added condensed half its bulk, or 49*6 parts. 

 The 500 parts of alcoholic vapour therefore employed iri 

 tlieir combustion 125*48 — 49*6 ±: 75-88 parts, forming 

 46*69 parts of carbonic acid gus, and a certain quantity of 

 water. 



If we consider the parts above mentioned as cubic inches, 

 and to 500 of these substitute their equivalent weight of 

 alcohol, we find, that 18*19 grs, of alcohol consume in their 

 combustion 75*88 cubic inches of oxigen gas, forming some 

 water, and 46*69 cubic inches of carbonic acid gas. These 

 results by a similar calculation to that made for the slow 

 combustion of alcohol, sect. Il, show that 100 parts of this 

 liquor contain 



"Elements of Carbon t • • . • 43*82 



ailcohol. Hidrogen..... i5-82 



Oxigen 41*36 



100. 



These elements may be deduced from the following ex« 

 pression. Ten grains of alcohol consume for their combus- 

 tion 38*54 cubic inches of oxigen gas, the thermometer be- 

 ing at 28 inches and the thermometer at 10° R. [54*5° 1^.], 

 forming water, and 23*67 cubic inches of carbonic acid gas. 

 This analysis This analysis, in which the whole of the alcohol was con- 

 more aiccurate c;unied, must be more accurate than that made by slow com- 

 thanthefor- tt t , 1. ,11 n 



mer. bustion, sect. II. I shall presently show, that a small quan- 



tity of nitrogen is to be included in both. 



Sect. IV. Examination of the loater produced by the com," 

 bustion of alcohol, 



Akohol in Boerhaave and Geoffroy observed, that the vapour 



burning forms ^q^^^^ \y^^ the combustion of alcohol was water. Lavoisier 



ak' ' ' '■ ' found 



