74 iCTION OF OXIDES ON ALKALINE HYDROSULPHUJIETS, 



formed 20rf of carbonic acid. Hence it follows, that 100 

 parts of olefiant gas by weight-contain 



Irs component Carbon ,. . . 86-43 



Hidro^en 14*34 



par! 



10077. 

 GeneraF From all tliese analyses I conclude, that olefiant gas, 



ccnc usions, ^j^^^^ properly prepared, contains no sensible quantity of 

 oxigen. In this state its specific gravity is equal or but lit- 

 tle inferior to that of atmospheric air. One part of this gas 

 by bulk consumes nearly three of oxigen for its combustion, 

 and forms two parts of carbonic acid. 



Omitting fractions, olefiant gas contains, by weight, 



Carbon 86 



Ilidrogen 14 



100. 



Condensation Fifteen parts of hid rogen appear to suffer a condensation 

 hidrogen in it. to about half their bulk in dissolving 85 parts of carbon; 

 and the olefiant gas thence resulting has by calculation very 

 nearly the specific gravity, that I found in my first expe- 

 riment. 



XII. 



Abstract of a Paper on the mutual Action of metallic Oxides 



and alkaline Hydrosulphurets: by 3Jr. Gay-LussaC*. 



T, 



JMutua! action JL HE paper, to a sketch of which I here confine myself, 



oxi<les and includes the experiment^; I have made on the mutual action 



alk;>Une hy- of metallic oxides and alkaline hydrosulphurets. 1 found, 



1st, That the metallic oxides, in which oxigen is greatly 



condensed, as those of zinc and iron, do not decompose the 



hydrosulphurets. 



2dly, That all the other oxides decompose the hydrosul- 

 phurets, and yield products, some of which vary according 

 to the particular nature of the oxides. 



♦ Ann de Chim. vol. LXXVIII, p. 86. Tiie principal results were 

 mentioned in a chemical lecture at the Polytechnic School on the 10th 

 of April, 1811. 



2dly, 



