In the metal we then have the equilibria : 
MME Jep CE 
i he A RE Ee 
and 
WE DD oa as ae a 
Between the metal and the electrolyte we can then give the 
equilibria as follows : 
Ms Ms 4,0 
Het pas Wea ee 
MM; + 0,0 
Ms My + v, 6 
Vt | ENEN 0. 
Mr ML +r,9 
in which it is noteworthy that these equilibria are probably established 
in the electrolyte with very great velocity, but that they are not 
established in the dry metal at the ordinary temperature, or exceedingly 
slowly. 
In the case that the metal possesses two different kinds of ions, 
we have to do with two solubility products viz. 
Dr NR ee 
and 
Dt tn CN ee EO ae 
Supposing that 1 is a base and M* is a noble ion, then as 
we have set forth at length in our former communication, Lan is 
comparatively great and Ly, small. If we immerse a homogeneous 
mixed erystal phase of two salts with homonymous anion, one of 
which possesses a great, and the other a small solubility product, in 
water, we have a state which in many respects corresponds with 
the case supposed here. 
Thus the electrolyte, in which the supposed metal is placed, will 
possess a comparatively great concentration of M “-ions and electrons, 
6, but a very small concentration of M*-ions, and that smaller 
than when the metal contained only J/*-ions, because in conse- 
quence of the relatively great solubility product Lijs, the electron 
concentration is much greater. 
It is clear that the explanations of different electromotive processes 
given in our preceeding communication through application of the 
idea “solubility product” of a metal are now just as well applicable 
to this more complicated case as to the simple one. Now, however, 
