The Outline of Science 



current by causing a coil of insulated copper wire to spin round 

 the ends or poles of a horseshoe-shaped magnet. He 

 us the tirst magneto-electric machine, developed now to such 

 'ul extent. 



Every taxicab, motor-bus, or motor-vehicle contains a Fara- 

 duy magneto, used to make the electric spark which fires 

 the charge of petrol vapour and air in the cylinder. Every 



dynamo in our electric lighting or power static i 

 . descendant of that first rudimentary magneto machine 

 raduy made by spinning a circular copper pfaftr 

 between the pules off a powerful magnet in the laboratories 

 of the Rovul Inst 



simplest illustrati< 

 a wire is to take an ordinary ho 

 arrows has seen, and with the 



v \ s. .'.: - v v : 



