JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, 

 TÛKYÏÏ, JAPAN, 



VOL. XXI., ARTICLE 7. 



On the Effect of Stress on Magnetization and 



its Reciprocal Relations to the Change 



of Elastic Constants by 



Magnetization. 



By 

 K. Honda and T. Terada, 



Lec'urers on Physics in the Töhyd Imperial Un'versitij. 



With Ô plates. 



Tn our previous oxj^eriments, we investigated in some detail 

 tlie cliange of elastic constants of several ferromagnetic metals and 

 alloys caused by magnetization, with special regard to the order 

 of applying the stress and the field, and found that in some cases, 

 the change is considerably large and moreover that it differs more 

 or less for different orders of applying the stress and the field. 

 In order to find the proper explanation of these facts, it will be 

 necessary to investigate with the same sj)ecimens as in the previ- 

 ous experiment, the change of magnetization by stress, with sjiecial 

 regard to the order of applying the stress and the field. 



Since J. J. Thomson'^ gave his theoretical exposition of the 

 reciprocal relations between magnetism and strain, several theories^^ 



1) J. J. Thomson, Application of Dynamics to Physicä and Chemistry, Chapter IV. 



2) F. Kolâcêlc, Ann. d. Phys., 1», p. 1, 1904; Ann. d. Pliys., 14, p. 177, 1904. A. Heyd- 

 welller, Ann. d. Phys., 11, p. 002, 190:!. R. CI ms, Ann. d. Phys., 1», p. 034, 1904. S. ,Sano> 

 Proc. TDkyd Math.-Phys. Sec, S, p. 175 and 207, 1904. 



