Ferromagnetic Wires by Magnetization, 



343 



25*63 kilograms per square millimetre the steel behaves like 

 well annealed soft iron. The amount o£ the change clue to 



tension is decidedly small compared with other ferromagnetic 

 metals. 



From fig. 7 we see that in Wolfram steel the effect of 



Fig. 7. 





in" 6 > 





^ A, 









1 



\ 



V 





too 







o 





X 





to 



K 







T 









< 



^\ 









St 

 I 













tension on the magnetic elongation is nearly proportional to 

 the tension. 



Fig:. 8. 



6. Nickel. — The results in nickel wire are graphically 

 shown in fig. 8. In weak fields the effect of tension is to 



