381 



trode is immersed in an aqueous solution of an acid, the concen- 

 tration .r, practically coincides with (he hydrogen point, and conse- 

 quently the point of intersection c' will likewise [)ractically lie on 

 the hydrogen axis. 



It is clear that the considerations given here are general, and 

 will, therefore, also ap|)ly to tlie supertensiou of other gases. 



As was demonstrated there is no essential difference between tlie 

 phenomenon of supertensiou and that of polarization. The former 

 is only a little more complicated iu so far that here also an unattac- 

 kable electrode has been inserted into the system. 



When, however, we consider the phenomenon of supertensiou at 

 non-unattackable electrodes, every difference with the ordinary 

 phenomenon of polarization has disappeared. 



Amsterdam, General and Anorganic- Chemical Laboratory 



June 18, 1918. of the Univerdty. 



25 

 Proceedings Royal Acad. Amsterdam. Vol XXI. 



