87 
from which appears that here the ordinary course is found. Also 
after anodic polarisation the silver has at first a more positive 
potential, which becomes smaller with continually diminishing velocity. 
After cathodic polarisation with the same current density at first 
a too negative potential is found, which becomes less and less 
negative, as is shown by the photo fig. 7. 
3,41SEC 
< > 
Fis.7 a 
Finally also a copper electrode with an area of 9 mm.’ in a 0,1 
NCuSO,-solution has been examined, and then the same thing was 
found as for silver in 0.1 N. Ag NO,, as appears from the photos 
fig. 8 and fig. 9. The current density amounted here to 0,666 
Amp./em,. 
ez pn = 
_ 58mV — 
CU 
ne = = < > 
31SEC 
Dee 
Figs. 
Cu 
Ti EN EEE EAN DDE FR ae 
-69mV SAISEC 
