in Cells for Direct and Alternate Currents. 



341 



fn qu< 



rnc 



9B-5 



\ 



20 



6(J 



V\ 



/\ 



*f.S 



50 



Frtquency 



/of 



/C 





/o 



'bo*, 



I 



40 



60 



20 





W 



so 



maximum potential, namely, 6'27 volts. That the aluminium plate 

 was an anode during the half period when the maximum coulombs 

 were a minimum, was proved by noting the direction of the electro- 

 meter deflection, when the positive pole of a Clark's cell was con- 

 nected to the insulated quadrant, and examining the observed 

 direction of the deflection during the experiment. Experiments 

 made upon the resistance of the electrolyte with two exploring 

 electrodes, employing alternate currents, show that at the tempera- 



