90 URANIUM, ANTIMONY, CHROMIUM, & c . 



It is obvious that the titanic acid occupied 

 the place of the carbonic acid expelled ; hence, 

 if we suppose that the whole titanic acid com- 

 bined with the soda, we can easily from these 

 experiments determine the atomic weight of ti- 

 tanic acid. For as the carbonic acid expelled 

 is to the titanic acid employed, so is 2*75 (the 

 atom of carbonic acid) to the atom of titanic 

 acid. In this way, the numbers in the last co- 

 lumn of this table were calculated. The results 

 obtained from these experiments, do not agree 

 with each other. The smallest atomic weight 

 of the acid derived from them is 5*396, and the 

 greatest 5*954. It is obvious that in experiments 

 of this nature, where we have no certain criterion 

 to determine whether the whole titanic acid has 

 combined with the soda, the highest result must 

 come nearest the truth. Consequently, 5*954 

 is the most accurate atomic weight of titanic 

 acid derived from these experiments. Now, 

 this number differs less than one per cent, from 

 6, the atomic weight of this acid, which I con- 

 sider as the most probable deduction from other 

 experiments : it is therefore a confirmation of 

 that deduction, and, together with my own 

 experiment, shows that the atomic weight of 

 this acid cannot be so high as 6*25. 

 Analysis of (4.) M. Rose formed combinations of titanic 



tert. titam- 



ateofsoda. acid with the two fixed alkalies, potash and soda. 

 His method was, to fuse a determinate weight of 



