108 Experimental Philosophy. [Lecture 8- 



which the circuit may be conveniently com- 

 pleted. By the discharge of an electrical battery 

 a large dog may be killed in an instant, and 

 the strongest man will be knocked down and 

 deprived of sensation; a wire of some mag- 

 nitude may be melted, and most of the phaeno- 

 mena of lightning are produced, but on a smaller 

 scale. 



