114 



AZOTIC GAS. 



Table exhi- 

 biting its 

 strength. 



The following table, from a set of experiments 

 which I made with great care, exhibits the spe- 

 cific gravity of various atomic compounds of real 

 nitric acid and water. The experiments were 

 made, by adding given quantities of water to 

 acid, of the specific gravity 1'4855, and taking 

 the specific gravity of the mixture. The strong- 

 est acid which I was able to obtain from nitre, 

 had the specific gravity 1%534. By determining 

 the composition of this acid, and observing the 

 rate at which the specific gravity diminishes with 

 the proportion of water added, I concluded, 

 that acid composed of 1 atom real acid, and 1 

 atom water, has the specific gravity 1-55. 



The acid, composed of 1 atom of acid and 4 

 atoms of water, seems to be the most intimate, 

 for its boiling temperature is the highest, being 

 248 while acid, both stronger and weaker than 



