70 MR. S. W. J. SMITH ON THE NATURE OF ELECTROCAFILLARY PHENOMENA. 



Hg 



KC1 KI 



Hg 



and let its observed E.M.F. be b, and suppose ir t is the potential fall from the KC1 to 

 the KI solution. Then 



" ",' + TT, = 6. 

 If TT, = 0, we must have 



a = b. 



The following experiments show the observed relation between a and b. 



