42 ELECTROLYSIS. 



If, for example, E = 0'9 volt and C = 150 amperes. If 

 \ve suppose that after the acceleration of speed we find : 

 E + e = 1 1 volt, from which e = 2 volt. 

 C + c = 250 amperes, from which c = 100 amperes. 

 We shall have for the counter electromotive force : 



E' = 0-9 -0-2 = 0-6 volt, 



and for the metallic resistance of the bath: 

 R' = = 0-002 ohm. 



The resistance of the conductors and of the machine itself 

 can be correctly ascertained ; it is therefore very easy to calcu- 

 late the total resistance and the power required for the treat- 

 ment of the electrolytic substances which it is proposed to 

 separate. 



In order to obtain as higli an economical result as possible, 

 it will be useful to determine from time to time both the counter 

 electromotive force which is developed between the electrodes 

 and the metallic resistance of the bath. 



