Ml;. S. W. . I. SMITH ON TIIK N.VITKK OF Kl.liC l'l;< CAl'II.I.AI.'V I'HKM iMKX.V. 87 



is the same for a given potential difference between the mercury ami tin- respective 

 solutions, if the solutions are equally concentrated and possess the same kation. 



6. An extension of this result shows that it is indifferent whether the kation be 

 K, Na, or H. 



7. The relation found I'm- tin- K< I and KI curves can be extended to the other 

 known cases in which the electrometer curves and liquid jxiteiitial difference c.-deu- 

 lations seem to be contradictory, in such a way as to account for the apparent 

 contradiction. Several of the cases are examined. 



8. The results in 4, 5, and 6 would give a direct and accxirate method of finding the 

 potential differences between equally concentrated solutions, and could be extended to 

 the case of solutions of different concentrations. 



9. The probability that the electrocapillary curves are never completely free from 

 influences other than electrostatic is shown by an examination of the relations between 

 tin- curves for imei |ii;illy concentrated solutions of the same salt. 



10. In confirmation of results obtained by G. MKYKK, in a slightly different way, 

 it is shown that if the potential difference between KC1 and KI is very small, the 

 potential fall from a half-normal solution of KI to a dropping electrode of the Paschen 

 tyj>e is about a quarter of a volt greater than that from a half-normal solution of 

 KOI to the same electrode. 



In the same way the potential fall from KI to mercury when the surface tension 

 is a maximum is about a quarter of a volt greater than that from KC1 to mercury 

 when the tension of the surface separating the solution from the mercury is a 

 maximum. 



These results follow from direct observations with dropping electrodes, and give 

 further support to the view that the first assumption of the Lippmann-Helmholtz 

 theory is true and that the second is not. 



