n; 2 



The theory of Faraday with respect to the induction of currents in 

 closed circuits takes the following form : — 



When the quantity of inductive magnetic action which passes 

 through a given circuit changes in any way, an electromotive force 

 proportional to the rate of change acts in the circuit, and a current 

 is produced whose quantity is the electromotive force divided by the 

 total resistance of the circuit. 



The mathematical discussion of the electro-magnetic laws is re- 

 served for another communication. 



