TITANIUM. 193 



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

 follows : 



Mean, 43.999, =b .0032 

 Pierre found, 44.432, d= .0073 



General mean, 44.017, db .0031 



The second ratio, which involved the weights of TiCl 4 taken in the last 

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

 silver chloride formed. The TiCl 4 proportional to 100 parts of AgCl is 

 given in a third column : 



7Ya 4 . AgCl. Ratio. 



3.31222 10.00235 33- "4 



4.20093 12.68762 33.111 



5.68888 17.17842 33.117 



5.65346 17.06703 33- I2 5 



4.08247 12.32442 33- I2 5 



Mean, 33.118, .0019 

 Rose found, 33.156, =b .019 

 Demoly found, 34.581, .030 



General mean, 33.123, .0019. 



In the third series the chloride was decomposed by water, and after 

 evaporation to dry ness the resulting Ti0 2 was strongly ignited. 



TtC/ t . TiO v Percent. TiO.,. 



6.23398 2.62825 42.160 



8.96938 3./8335 42.181 



10.19853 4.30128 42.176 



6.56894 2.77011 42.170 



8.99981 3-79575 42.176 



8.32885 3-5"58 42.162 



Mean, 42.171, .0022 

 Rose found, 42.933, dr .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 



