384 



H. XAGA0KA AND K. HONDA 



producing the elongations 0.898 x 10" 5 and 1.796 x 10" 5 re*p., we find 

 the following numbers for Jc and k" : 



Table. 2. 



The numbers for I: and ¥ calculated from the stress effect on the 

 magnetization of nickel is in rough agreement with those deduced 

 from the strain caused by magnetization, the coincidence being closer 

 with smaller loading. 



Let us now calculate the strain, which would be produced by 

 magnetization, according to Kirchhofes theory, from the stress effect, 

 and the stress effect from the strain caused by magnetization. If we 

 adopt the numbers in Table 1, and calculate the change of magnetiza- 

 tion due to longitudinal pull, we obtain the following numbers. 



