EFFECT OF MAGXETIZATEOX OX THE PERMAXEXT TWIST OF NICKEL. 



335 



was placed between two Hat coil.-s, through which niagiietizing currents 

 of various strength were passed. The wire, liowever, did iKjt show the 

 least sign of being affected by transverse magnetizati<jn, although the 

 apparatus was capable of measuring 0/1 of deflection. 



The next point of inquiry was a comparison of these effects with 

 those produced by twisting magnetized nickel wires. The apparatus 

 used for examining the latter was similar to that used by Professor 

 Wiedemann, in his investigation on tlie effect of twist on magnetiza- 

 tion, and described in his ' Elektricität ' Ikl. 3. A nickel wire 1 mm. 

 thick and 30 cm. long had two pieces of stout brass wire soldered at 

 the ends. The wire was placed magnetic east and west, and carefully 



