423 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 54 



The antecedent atomic weights are — 



Ag = 107.880, 

 CI = 35.4584, 



.00029 

 .0002 

 H = 1.001 



ro, ± 



Br = 79.9197, ±: .0003 

 I =120.9204, ± .00033 

 .00001 



Hence, 



From ratio 



3 Fe = 55.828, ± .0018 



2 55.836, ± .0062 



1 55.927, ± .0018 



7 56.042, ± .0532 



4 56.092, ± .1144 



6 56.213, ±.0026 



5 56.231, ±: .0428 



General mean, Fe = 55.943, 



.0011 



The last four of these values are evidently not to be trusted. The 

 first three, which are good, give a general mean of Fe = 55. 880, ±.0012. 

 This agrees well with the oxide series of Richards and Baxter, and is 

 probably near the truth. 



