SULPHUR. 



And we obtain its composition by stating the 

 specific gravity of each constituent, for it must 

 be a compound of 



Hydrogen 0-0694 or 0-125 

 Sulphur 1-1111 - 2-000 



1-1805 2-125 



No doubt, it consists of an atom of hydrogen 

 united to an atom of sulphur; 0'125 is the 

 weight of an atom of hydrogen, and 2 must, Atom of 

 therefore, represent the atomic weight of sul- su 

 phur. 



3. We see from the composition of sulphuret- 

 ted hydrogen gas, that a volume of sulphur va- 

 pour is equivalent to an atom, and a volume of 

 oxygen gas is equivalent to 2 atoms. Now, sul- 

 phurous acid gas is a compound of 1 volume 

 sulphur vapour and 1 volume oxygen gas ; it is, 

 therefore, a compound of 1 atom sulphur and C 2 

 atoms oxygen. And, since an atom of sulphur Atomic 

 weighs 2, the atomic weight of sulphurous acid 

 is 4. acid - 



III. It would be easy to show, by a similar 

 process of reasoning, that an atom of hyposul- 

 phurous acid weighs 3. 



Thus, the atomic weights of sulphur and its 

 acid compounds are as follows 



WEIGHT OF ATOM. 



Sulphur 2 



