1107 



When now also on rapid solution the metal assumes internal 

 equilibrium superiiciallj, the metal phase will lie on ad ov on the 





prolongation of this line, because the different points of this ourve 

 and its prolongation represent states of internal equilibrium of the 

 metal in electromotive equilibrium with electrolytes which lie on 

 the line ac or its prolongation. 



When not only the metal phase, but also the hydrogen phase of 

 the three-phase equilibrium mentioned just now is in internal equili- 

 brium, the metal phase must lie in (/, the hydrogen phase in <?, and 

 the electrolyte in the boundary layer in c, the electrolyte outside 

 the boundary layer possessing the concentration a\. The zinc-ions 

 will, therefore, continually diffuse from the boundary layer outwards, 



