346 



TT. XAGAOTCA. 



that is, a twist per cm. length of ±2.°2. When once the maximum 

 difference in the circular lines of induction is reached, the suscep- 

 tibility in the direction of compression and of stretching gradually 

 tend to equality, so that in strong magnetizing field, the current he- 

 comes very small. Subjecting the wire to higher degrees of com- 

 pression and of stretching makes the difference of susceptibility in 

 strong fields greater, although the maximum difference of suscep- 

 tibility becomes less after a certain amount of stress is exceeded. 

 Thus it will be seen that the existence of a maximum transient current 

 bears a close relation to the Villari critical point and an analogous 

 point in compressed iron. 



Another set of experiments was tried by the following method. 

 Instead of twisting the wire always through the same angle while 

 the magnetizing field was varied the latter was kept constant, 

 while the wire was twisted through angles of twist of gradually in- 

 creasing amount. For each successive value of twist, the transient 



