198 



H. NAGAOKA. 



14) obtained in S> = 0.34 shews that the nature of hysteresis is similar 

 to the two former results for smaller twists and is the reverse ofthat 

 for the twist of ± 4°. 5 per em. But in the stronger field of £> == 2.4. the 

 amount of hysteresis was greatly diminished as may be seen from the 

 curve shewn in Fig,'. 15. For £}=5.1, the deflections were as follows: — ■ 



The curve as plotted in Fig. 16 shews what change has taken 

 place. There is increase of magnetization on twisting till the extreme 

 limit of torsion is attained. On untwisting there is diminution, and. 

 for the corresponding angles of twist, the intensity of magnetization 

 i< always less than on twisting. In other words, the magnetization 

 has no tendency to lag behind on untwisting, hut rather the contrary. 

 There is negative hysteresis for this particular combination of twist 

 and magnetizing force. In fact the nature of hysteresis is similar 

 to that for the twist of ± 4°. 5. hut reverse to any so far obtained for 

 smaller twists in low magnetizing fields. As the magnetizing field 

 is increased, the same order of things comes in, and the course of the 



