98 STATIC ELECTRICITY 



V' 



or C = 2-13 



V - V 



By this method Wilson found the capacity of an electroscope 

 which he was using to be 1*1 cm., and this was practically constant 

 for different positions of the gold leaf. 



In carrying out this experiment the wires, in order to reduce 

 their capacity, should be made as fine as possible and not 

 longer than is necessary to keep the sphere sufficiently distant 

 from the electroscope. 



