GERMANIUM. 195 



These are to be computed with — 



O = 15.879, =h .0003 Br = 79.344, =b .0062 



Ag = 107. 108, =b .0031 AgCl =7 142.287, ± .0037 



CI ^ 35.179, =b .0048 AgBr^ 186.454, =b .0054 



For the molecuhir weight of titanium chloride they give two values : 



From (i) TiCl^= 188.583, d= .0144 



From (2) " = 188.519, ± .0119 



General mean TiCI^ = 188.545, =fc .0092 



For TiBr^ we liave — 



From (5) TiBr^ = 365.174, ± .0157 



From (6) " = 365. 163, =h .0380 



General mean TiBr^ = 365. 1 72, =b .0145 



And for the atomic weight of titanium five values are calculable, as 

 follows : 



From molecular weight of TiCl^ Ti ^ 47.829, zh .0213 



From molecular weight of TiBr^ " =47.796, ±z .0260 



From (3) " = 47-809. ± .1725 



From (4) " = 47.698, ± .0268 



From (7) " =47.738, ±.0787 



General mean Ti = 47.786, ± .0138 



If = 16, this becomes Ti = 48.150. 



GERMANIUM. 



The data relative to the atomic weight of germanium are rather scanty, 

 and are due entirely to the discoverer of the element, Winkler.* The 

 pure tetrachloride was decomposed by sodium carbonate, mixed with a 

 known excess of standard silver solution, and then titrated back with 

 ammonium sulphocyanate. The data given are as follows : 



■ Journ. fiir Prakt. Chem. (2), 34, 177. iS 



