TITANIUM. 



193 



decomposition with water and titration with silver, was in detail as 



follows : 



TiCl^. Ag. TiCl^ : looAg. 



243275 5-52797 44.008 



5.42332 12.32260 44-015 



3.59601 8. 17461 44.000 



3.31222 7-52721 44-003 



4.20093 9-54679 44.004 



5.68888 12.92686 44.008 



5.65346 12.85490 43-979 



4.08247 9-28305 43-978 



Mean, 43.999, zh .0032 

 Pierre found, 44.432, ± .0073 



General mean, 44.017, ± .0031 



The second ratio, which involved the weights of TiCl^ taken in the last 

 five determinations of the preceding series, included the weighing of the 

 silver chloride formed. The TiCl^ proportional to 100 parts of AgCl is 

 given in a third column : 



TiCl^. AgCl. Ratio. 



3.31222 10.00235 33-114 



4.20093 12.68762 33-1 1 1 



5. 68888 17.17842 33.117 



5-65346 17-06703 33-125 



4.08247 12.32442 33-125 



General mean, 33.123, ± .0019. 



In the third series the chloride was decomposed h}^ water, and after 

 evaporation to dryness the resulting TiO^ was strongly ignited. 



TiCU. 

 6.23398 

 8.96938 

 10.19853 

 6.56894 

 8.99981 

 8.32885 



Mean, 42.171, =b .0022 

 ■ Rose found, 42.933, ± .121 



Demoly found, 38.294, ± .180 



General mean, 42.171, ± .0022 



In short, the work of Rose, Pierre, and Demoly practically vanishes- 

 Furthermore, as will be seen later, the three ratios now give closely 

 13 



