ATOMIC WEIGHTS 



483 



Ratio GAgCl-.Ayn.PWh: :100:x. 



Seubert 51.864, ± .0410 



Archibald 51.634, ± .0032 



General mean 51.636, ± .0032 



For ammoninm platinbromide Ai-chibald gives these data : 



Hence the followino- ratios : 



The percentage of phitinnm in AnioPtBrg combines with Halberstadt's 

 figures thns : 



Halberstadt 27.429, ± .0027 



Archibald 27.464, ± .0032 



General mean 27.443, ± .0021 



The analyses of potassium phitinbromide were like those of chloride, 

 the bromine being estimated in two ])ortions, 2Br and 4Br. The weightii 

 are these : 



From these weights nine ratios are deducible, as in the case of the 

 platinchloride, as follows: 



