286 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 54 



Ignoring Mosander's work n^^ nnav;ii!aI)lo, we liave the following ratios 



to consider: 



(1). 4Ag:TiCl,: : 100: 44.017, ±: AWIM 

 (2). 4AgCl:TiCl^: :100:33.123, ± .0019 

 ( 3 ) . 4 AgCl : TiO, : : 100 : 13.980, ± .0303 

 (4). TiCU:TiO,: : 100: 42.171, ± .0022 

 (5). 4Ag:TiBr4: :100:85.235, ± .0027 

 (6). 4AgBr:TiBr,: :100:48.9C2, ± .0049 

 (7). TlBr,:TiO.,: : 100: 21.773, ± .0062 



Compnting with Ag = 107.880, 

 Br = 79. 9197, ±.0003, we have— 



.00029, 01 = 35.458-1,^.0002, and 



Prom ratio 7 Ti = 48.0699, rh .0292 



" 2 48.0794, ± .0135 



" 4 48.0947, ± .0072 



" 1 48.1085, ± .0135 



" 6 48.1232, ± .0369 



" 5 48.1273, ± .0117 



" 3 48.1553, ± .1742 



General mean. Ti = 48.0991, ± .0049 



This may be rounded off to 48.1. 



GERirA^IUM. 



The data ixdative to tlie atomic weight of germanium are imperfect, 

 and due entirely to the discoverer of the element, Winkler.^ The pure 

 tetrachloride was decomposed l)y sodium carbonate, mixed with a known 

 excess of standard silver solution, and then titrated back with am- 

 monium sulphocyanate. The data given are as follows: 



GeCl,. 

 .1067 

 .1258 

 .2223 

 .2904 



Hence Ge= 72.504. 



Cl found. 

 .076112 

 .083212 

 .147136 

 .192190 



Per cent. Cl. 

 66.177 

 66.146 

 66.188 

 66.182 



Mean, 66.173 



• Journ. prakt. Chem. (2), 34, 177. 



