Polarization of Platinum Plates. 495 



The characteristics of both lines are the same. At both 

 temperatures, for values of the current lower than *5 ampere 

 the line is concave to the axis of current. An accident to 

 the voltameter during the time that this part of the curve was 

 being investigated rendered these readings less trustworthy 

 than the rest. The course of the lines is therefore only 

 roughly indicated by dots ( — . — . — . — ) in this part, but 

 it may be noticed that they seem to tend towards a common 

 point on the axis of potential at about 1*5 volt. The curved 



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Amperes. 



part of the line extends to a point where the current-value 

 was about 1*3 or 1*4 ampere, the current-strength required 

 for the establishment of maximum polarization being some- 

 what greater at the higher temperature. Beyond this point 

 both lines are for some distance straight, a deviation becoming 

 again manifest when the current-value reaches 35 amperes, 

 where the line turns up and becomes convex to the current- 



