CHANGE OF ELASTICITY BY MAGNETIZATION'. 



^E 



(e-e')E 



E ~T-{e-e)K' 



If we wish to compare two curves corresponding to the tensions T 



and T + jT, the ab(n'e equation becomes 



oE Je.E 



~Ë~~JT-J^.E' 



where Je is the difference of magnetic elongations corresponding to the 



tensions T and T + zlT. 



In the preceding paper, two of us studied the effect of tension on 



magnetic elongation for iron, Wolfram steel, nickel, and nickel steel 



From these results, we calculated the change of elasticity, as shown 



in the following tables : — 



Soft iron 



Wolfram steel 



Nickel 



Nickel .steel (45% Ni) 



AT 



H 



10 



20 



60 



120 



260 



8H3gr. 



688 



ÔE 



—3.85X10 

 —5.93 

 —1.46 

 -f-3.14 



4-6.90 



E 



4304ijr. 



1376 



ü, 



1.45X10 



6.33 

 —7.93 

 —2.54 



+ 1.97 



—0.44X10 

 — 1.36 

 —8.77 

 -7.53 

 —1.93 



