360 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 54 



Oxidation Series. 



79.329 

 79.324 

 79.328 



Mean, 79.327 

 Mean of all, 79.320, ± .0068 



Hence W = 184.108. 



Closely agreeing with these figures are those of Marchand/ published 

 in the following year : 



Reduction Series. 



Hence W = 184.114. 



The figures obtained by v. Borch ' agree approximately with the fore- 

 going. They are as follows : 



Reduction Series. 



79.310 

 79.212 

 79.289 

 79.313 

 79.225 

 79.290 

 79.302 



Mean, 79.277 



Oxidation Series. 



79.359 

 79.339 



Mean, 79.349 

 Mean of all, 79.293, ± .0108 



Hence W = 183.806. 



lAnn. Chem. Pharm., 77, 261. 185L 

 'Journ. prakt. Chem., 54, 254. 1851. 



