CADMIUM. 165 



For cadmium bromide we have 



From (7) CdBr 2 = 270.073, =b .0136 



From (8) " = 270.124,^.0113 



General mean CdBr 2 = 270.105, .0087 



Hence Cd = 111.417, .0151. 



For cadmium there are nine independent values, as follows : 



From (3) Cd = 1 10.793, d= .0081 



From (4) " = i 10.890, .0069 



From (2) " = 1 1 1.004, db - OO 47 



From (11) " = 111.127, -0095 



From (9) " = 1 1 1. 183, .0155 



From (10) " = 111.202, .0093 



From (i). " = 111.227, -0034 



From molecular weight CdBr 2 " = 111.417, =b .0151 



From molecular weight CdCl 2 ....... ".= 111.525, .0138 



General mean Cd = iii.ioo, dz .0022 



If 0=16, Cd= 111.947. 



This result is obviously uncertain. The data are far from being con- 

 clusive, however, and I am therefore inclined to trust the mean rather 

 than any one of the values taken separately. It is quite possible that 

 the highest of all the figures may be nearest the truth, as Bucher's ex- 

 periments seem to indicate ; but until new evidence is obtained it would 

 hardly be wise to make any selection. The mean obtained agrees well 

 with the data of Morse and Jones, Lorimer and Smith, and Hardin. 



