220 



ELECTRIC CONDENSERS. 



charged and discharged in the same way as a single jar ; 

 but great care is needed, for if the discharge were to take 

 place through the human body the result would be serious 

 and possibly fatal. 



358. Distribution of Electricity. Many ex- 

 periments have been made which go to show that when a 

 body is electrified, the electricity passes to the surface and 

 escapes if the body be not insulated. A bomb-shell and a 

 cannon-ball of equal size will receive equal quantities of 

 electricity from the same source. The hollow conductors 

 used in electric experiments are as serviceable as if they 

 were solid. 



FIG. 158. 



(a.) A metal globe with an insulating support (Fig. 157) is pro- 

 vided with two closely-fitting hemispherical shells having insulating 



