ATOMIC WEIGHTS 



99 



Ratio. 

 131.092 

 130.974 

 131.024 



Mean, 131.030, ± .023 



The two series of determinations by Baxter ' are much more elaborate, 

 and far more conclusive. Before being weighed, the silver bromide was 

 fused in a current of air saturated with bromine. The figures given 

 below are for vacuum weights, which is true for all of Baxter's data as 

 cited in this section. 



1905 Series. 



.00045 



Mean, 131.0171, 



The three series combine as follows : 



Dumas 131.030, ± .023 



Baxter, 1905 131.0175, ± .00045 



Baxter, 1906 131.0171, ± .00013 



General mean 131.0172, ± .00912 



.00013 



^ Proc. Amer. Acad., 41, 82. 1905. Ibid., 42, 201. 1906. 



