ACIDIFIABLE COMBUSTIBLES. 



Hyposulphurous acid . 3 



Sulphurous acid . . 4 



Sulphuric acid . . 5 



Sulphuretted hydrogen . 2-125 



Hyposulphurous acid is a compound of 1 atom + 1 atom 

 Sulphurous .... 1 -|- 2 



Sulphuric .... 1 -\- 3 



HYDROGEN. 



Sulphuretted hydrogen . 1 + i 



The hyposulphuric acid of Gay-Lussac is formed 

 by the union of an integrant particle of sulphu- 

 rous and sulphuric acids with each other ; conse- 

 quently, its atomic weight is 9 ; and it is a com- 

 pound of 2 atoms sulphur with 5 atoms oxy- 

 g&i. 



SECT. VI. 



OF THE ATOMIC WEIGHT OF SELENIUM. 



SELENIUM is so difficult to procure, that I have 

 been obliged to confine my experiments to very 

 minute quantities ; not having had more in my 

 possession than about 40 grains, which did not 

 put it in my power to obtain satisfactory results. 

 For the investigation of its atomic weight, there- 

 fore, I must rely almost entirely upon the exper- 

 iments of Berzelius. Fortunately, his experi- 



