130 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



motive force during rotation and no correction was made for it in the 

 calculations 



Further development of the centrifugal method should be in the 

 direction of eliminating these residual potential differences between 

 the electrodes. This could best be done by having the liquid circulate 

 through the apparatus so as to pass from one electrode to the other 

 and thus assure the same conditions at both. 



TABLE I. 

 (Dec. 2, 1909.) 



i 



Solution: Molal KI, j^ Molal I^. 



Fj = 29.40 cm., r, = 4.3 cm. 



Standardization of magneto : 

 av. dev. ±0.0145). 



Rev. of rotator per second 

 Voltage of magneto 



1.050(7expts. 



