SELENIUM. 



compound of 1 atom chlorine = 4%5, and 1 atom 

 silver = 13*75 ; so that 18*25 grains of it con- 

 tain 13 '75 grains of silver: consequently, 1-844 

 parts of this chloride must consist of 



Chlorine 0-4546 

 Silver 1-3894 



1-8440 



Now, this 1-3894 of silver constituted one of 

 the constituents of the 1-888 parts of seleniet of 

 silver ; the only other constituent was the se- 

 lenium : consequently, seleniet of silver is com- 

 posed of 



Silver 1-3894 or 13-75 



Selenium 0-4986 - 4-9343 



1-8880 



13-75 being the atomic weight of silver, 4-9343 

 must represent the atomic weight of selenium. 



The silver in the acetate, through which the 

 selenietted hydrogen gas was passed, was in the 

 state of an oxide composed of 



1 atom silver = 13-75 

 1 atom oxygen = 1 



14-75 



But in the seleniet it was in the metallic state : 

 the reason was, that the selenietted hydrogen 

 and the oxide of silver, had mutually decoin- 



P2 



