38 URANIUM, ANTIMONY, CHROMIUM, &c. 



Now, if we consider it as composed of 



4 atoms phosphoric acid 14 



2 atoms peroxide of uranium 56 



1 atom lime . . 5-25 



12 atoms water . . 13-5 



88-75 



we have almost the identical numbers of Berze- 

 lius. We may, therefore, represent the constitu- 

 tion of uranmica in this way : 



2 atoms sesquiphosphate of uranium 66*5 

 1 atom subsesquiphosphate of lime 8-75 

 12 atoms water . 13-5 



88-75 



The green uranmica, from Gunnis Lake mine, 

 in Cornwall, had been shown, by Mr. Richard 

 Phillips, to contain phosphoric acid. This in- 

 duced Berzelius to analyze it, and the result of 

 his experiments agrees very near with the num- 

 bers obtained by Phillips. He found its consti- 

 tuents : 



Phosphoric acid . 14 



Peroxide of uranium . 54-2 



Oxide of copper . 7-59 



Water . . . 13-54 



8933 



