URANIUM, ANTIMONY, CHROMIUM, &c. 



Sulphuric acid 

 Peroxide of uranium 

 Potash 

 Water . 



100-000 



The reader will be better able to form an es- 

 timate of the constituents of this salt if I state 

 them in atomic proportions : 



2^ atoms sulphuric acid 12-5 + 1-2 

 1 atom peroxide of uranium 28 



1 atom potash 6 + 2-308 



1 atom water . . 1-125 + 0-699 



47-625 4-207 



Or we may state the constituents this way : 



1 atom sulphate of potash . 1 1 

 1 atom sesquisulphate of uranium 35-5 

 1 atom water 

 Excess of sulphuric acid 



potash 



water 



51-832 



The weight of the integrant particle of the salt 

 is not much higher than I found it, but instead 

 of the 4 atoms of water which I found, there is a 

 surplus of potash and sulphuric acid, and not in 

 such proportions that they saturate each other. 

 It is quite obvious, that this salt as it was 



