AZOTIC GAS. 131 



the azote, in consequence of the gas standing 24 

 hours over the water. 



The experiment was repeated seven times, in 

 various ways, and the mean of the whole came 

 exceedingly near 11-8 cubic inches of dry azotic 

 gas from 13*5 grains of sal-ammoniac. This 

 weighs 3*4993 grains, giving us the composition 

 of ammonia as follows ; 



Azote 1'74965 or 1 volume 



Hydrogen 0-37535 3-0028 



2-12500 



This analytical result of direct experiment comes 

 within less than Ttuioth part of the theoretical 

 estimate ; and, taken together with the preced- 

 ing facts, can leave no doubt of the composition 

 of ammonia. 



