98 URANIUM, ANTIMONY, CHROMIUM, &c, 



ed with foreign bodies, and, on account of the 

 small size of the grains, these cannot be separat- 

 ed completely from the true iserine. 



The only remaining known ore of titanium 

 Sphene. (except the oxides) is sphene, which Rose has 

 recently analyzed anew, and found to consist of 

 an integrant particle of trisilicate of lime, united 

 to an integrant particle of trititaniate of lime. 

 Hence it consists of 



1 atom trisilicate of lime 9*5 



1 atom trititaniate of lime 21-5 



Or, its constituents may be stated in this way : 



3 atoms silica 6 or 19*355 



3 atoms titanic acid 18 - 58-064 

 2 atoms lime . 7 - 22-581 



31 100 



This differs very considerably from the analysis 

 of Klaproth ; but that chemist was not in posses- 

 sion of a good method of separating titanic acid 

 from silica. 



