KFFI'XT OF STPvl'.SS OX Af A( -Xl'TIZ ATIOX. 



2:î 



NICKEL. 



/=i4.r)° c. 



(c) Change of marjuetization hy tivht under different 



tensirnu : {jil, z),,^ ■,■. 



In weak fields, tlie magnetization is increased l)y twist, but 

 in strong fields, it is slightly diminished. As shown in Figs. 1*> 

 and 20, the curves (<^A ")y/, /• hend slightly towards the axis of 

 the twist ; the curvatures become less as the tension is increased. 

 Exce])t in weak fields, the iuitial effect is inconsiderable ; it 

 also becomes less as the tension is increased. 



Curves {<jdi, H)-, from {'^^i~)ii, r are drawn in Figs. '21 and 22 

 in full lines ; they have steep positive maxima from which 

 the curves slope down gradually to the higher field, cut the axis 



