TITANIUM. 



89 



the way just stated. Hence, its weight may 

 have exceeded the truth a little ; had the potash 

 in it amounted to O035 grain, the atomic weight 

 of titanium would have come out exactly 4. I 

 am disposed to consider the mean of the weight 

 derived from the sulphuret, and from the acid 

 obtained from metallic titanium, as coming very 

 near the truth. Now, this mean is 4*0434 ; 

 which comes so near 4, that we may without 

 hesitation pitch upon that number as the true 

 atomic weight of titanium. The atomic weight 

 of titanic acid is 6, and that of protoxide of ti- 

 tanium undoubtedly 5. 



(3.) M. H. Rose employed another method Ratio be- 



/ , tweenthe 



to determine the saturating power of titanic atoms of 



acid. He mixed determinate weights of it with 

 anhydrous carbonate of soda, and exposing the tamc aud ' 

 mixture to a red heat, ascertained how much 

 carbonic acid gas was driven off precisely in 

 the way described in a preceding part of this 

 work, when I tried by a similar process to de- 

 termine the atomic weight of silica. The fol- 

 lowing table exhibits the results of Rose's expe- 

 riments. 



