96 STUDIES IN ELECTRO-PHYSIOLOGY: 



the inductive effect of the battery charge, and quantities 

 of electricity equal to that charge, but of opposite sign to 

 each other, will be collected upon the inner plates ; these, 

 however, and therefore their electrical condition, do not 

 in any way influence the joint capacity of the two con- 

 densers, which in accordance with the law must be 



1 1 



= TO = 15 = 3-75 microfarads ; 



the charge being 3-75 x 3 = 11-25 microcoulombs, and 

 the potential differences of the charges on C and D 0-75 

 volt and 2-25 volts respectively. 



Similarly the charges on three condensers of varying 

 capacities, and connected in series, as also their potential 

 differences, may be shown by employing three glass vessels 

 for the purpose ; the larger the vessel the greater the 

 capacity. 



6 c 



a. 



Fig. 10. 



a is J and b f the size of c, and we will call the respective 

 capacities 2, 4, and 6 microfarads and the E.M.F. of the 

 battery 2 volts. 



The joint capacity of a, b, and c will be 



mcros. 



The charges on the three condensers will be exactly the 



