92 



K. HONDA. 



in weak fields and to increase it in strong ones. The field at 

 which the temperature produces no effect is about 52 C. G. S. units. 

 In the case of wolfram steel, this field, if it exists, seems to be 

 pushed to an intensely strong field. We also observe that the 

 effect of circular field on the change of length by longitudinal 

 magnetization is tolerably large, as observed by Bidwell. 



15. The results of the experiments on the change of length 

 by longitudinal magnetization with a constant circular field are 

 summed up in the following table and graphically shown in 

 Fig. 10, these results being reduced to 18.7° C. 



TABLE Vll. 



Thus the nature of the change of length is the same as in 

 the reciprocal case already mentioned, except that the sign of 

 the change is opposite. As shown in the figure, in strong fields, 

 the curve corresponding to the change of length with a constant 

 circular field lies alwavs above that witli no circular field. 



