MA GNE TO-ELE CTRIC GENERA TORS. 



49 



Several mechanicians accomplished this, among others 

 Pixii, Clarke, Page, Nollet, &c. ; and for this end they had 

 only to cause to revolve before a permanent horseshoe 

 magnet an electro-magnet with two branches, wound round 

 with a quantity of wire large enough to allow the inductive 



FIG. 12, 



action to be developed in all its power. With this arrange- 

 ment the electro-magnet is, in fact, magnetized on approach- 

 ing the poles of the permanent magnet, and while becoming 

 a magnet it produces in the wire surrounding it an inverse 

 current, which gives place to a direct current as soon as the 

 electro-magnet begins to lose its magnetism by receding. As 



4 



