ALTERNATING-CURRENT ARCS 125 



may be produced by placing an alternating-current arc 

 between carbon terminals in a magnetic field. One end 

 of the arc can then be made to alternate between two 

 terminals which are very near each other but not in contact. 

 As a result one of these terminals will receive nearly all of 

 the positive current and the other nearly all of the negative. 

 The terminals can then be connected so as to produce a 

 direct current through part of the circuit. 



