46 



ART. 4. K. HONDA AND T. TERADA. 



hence by division, we get' 



or, 





d'+dd 



wliere K is the rigidity of the specimen, and oK its change due 



be neglected, we have 



to magnetization 



If 



Ö 



dK 



Krr 



d 



1 + 



If tlie change were greater than 1»^, the first equation was 

 used, and if it were less, the second equation was availed of. 

 'i'he results of experiments are as follows : — 



Nickel. Fig. 35. 



TABLE XXVIII, 



