170 



THE ELECTRIC LIGHT. 



strument wrought only by mechanical motion. 

 The moment we give motion to this soft iron 

 .in front of the magnet, we get a spark. It is 

 true in this apparatus it is very small, but it is 

 sufficient for you to judge of its character. It 



Fig. 59. 



is the magneto-electric light, and an instrument 

 has been constructed as there shown (fig. 59) 

 which represents a number of magnets placed 

 radially upon a wheel three wheels of magnets 



