CARBON. 1,51 



lumes of oxygen gas. After combustion there 

 remain two volumes of carbonic acid gas. 



This gas is formed when alcohol and sulphuric 

 acid, in the proportion of one part of the former 

 to four of the latter, are heated. It exists also 

 as a constituent of coal gas. 



The third consists of T^ni spe- 



cies. 



3 volumes carbon vapour 1 



. , > condensed into 1 volume. 



3 volumes hydrogen gas ) 



Its specific gravity is 1*4,583. It requires 4i 

 times its volume of oxygen gas for complete 

 combustion ; and the residual gas consists of 

 three volumes of carbonic acid gas. 



Mr. Dalton discovered this gas as a constitu- 

 ent in the gas extricated, when whale oil is ex- 

 posed to a red heat. This gas is employed for 

 lighting houses, and even streets, under the 

 name of oil gas. 



The fourth consists of Fourth s pe . 



cies. 



4 volumes carbon vapour I , 



v condensed into 1 volume. 

 4 volumes hydrogen gas J 



Its specific gravity is 1*9444. It requires six 

 times its volume of oxygen gas for complete com- 

 bustion 5 and a volume of it, thus burnt, leaves 

 four volumes of carbonic acid gas as a residue. 



The vapour of sulphuric ether constitutes a 

 gaseous body of this kind. But in this vapour 

 there exists, likewise, a volume of the vapour 



K 4. 



