NOMOS. 



67 



essentially like that which was originally contrived 

 by Dr. Faraday. Here we have the same general 

 arrangement as in the last instrument, with this dif- 



Fig. 16. 



ference, that the conductor, c, is moveable and the 

 magnet, M, fixed. The conductor hangs from the 

 end of the supporting arm by means of a small piece 

 of wire. The magnet is fixed by putting its lower 

 extremity into a small socket-prolongation of the 

 wire which passes through the foot of the glass from 

 the binding screw on the left. The connexion with 

 the battery is made as before, and when it is made, 

 the conductor, c, is found to revolve around the 

 vertical magnet, to the right or to the left, according 

 to the direction of the current. 



How, then, are we to explain these extraordinary 



F 2 



