Afler llie ciirreiil li;i(l Ueeii iii(errii|ile(l, ik» pokMilial diHerciu'e willi 

 llie iuixiliai'v electrode was lo he perceived. 



Ill I lie first column tlie ciin-ent density is foiiiid expressed in milli- 

 ani|)ères per cm". In the second column the [)Olciitia,l dilfercnce with 

 the auxiliary eleclrode is indicated in Volts, liie metal serxing- as 

 anode (anodic polarisation tension) ; and in the third column the 

 same is oiven for the case that the metal served n^ cathode {yü{\\oé\Q. 

 polnrisation tcMision). 



TABLE 1. 

 Silver electrode imrrrersed in ''2 N. Ag NOj-solution. 



m.A 

 cm 2 



V-anode 



V-cathode 



25 

 50 

 100 

 200 

 300 

 400 

 750 



-f 0.03 



+ 0.03 



+ 0.04 



+ 0.05 



+ 0.05 



+ 0.06 



+ 0.09 



— 0.006 



— 0.012 



— 0.014 



— 0.015 



— 0.016 



— 0.018 



— 0.020 



It is seen from this table that the silver is not materially nobler 

 during- the solution, and not materially baser during' the deposition 

 than the auxiliary electrode, which is entirely in internal equilibriun.'. 

 The polarisation is therefore exceedingly slight here, from which we 

 may deduce that the metal silver very (piickly assumes internal 

 equilibrium. Under these circumstances it is of course out of the 



TABLE 2. 

 Copper electrode in ' 2 N . Cu (N03)2-solution. 



