NOMOS. 



65 



around an electrical conductor under certain circum- 

 stances ; and he at length succeeded, not only in 

 realizing his expectations, but in showing that the 

 conductor would revolve around the magnet if the 

 magnet were fixed and the conductor moveable. 



Many instruments are well calculated to show the 

 revolution of a magnet around an electrical conductor, 

 but none is more simple than one which 



.,. -,. . /i ,1 The rotation 



is a slight modification of the instrument of a magnet 



originally contrived by Dr. Faraday. In 



this instrument we have the conductor conductor - 



Fig. 15. 



around which the magnet rotates, c, a small bar 

 magnet, M, and a glass containing mercury. These 



F 



