TELLURIUM. 239 



great deal of probability, from the known consti- 

 tution of the other similar compounds. If it be 

 a compound of 



1 volume tellurium vapour 1 



> condensed into 1 volume, 

 1 volume hydrogen gas J 



as is the case with all the others, and if a vo- 

 lume of tellurium vapour be equivalent to an 

 atom, then the atomic weight of telluretted hy- 

 drogen is 4-215, and its specific gravity 2-2916. 



One volume of this gas will require, for com- 

 plete combustion, one volume of oxygen gas, 

 one half of which will go to the formation of 

 water, and the other, to the formation of oxide 

 of tellurium. 



