364 Dr. J. R. Ashworth on the Anhi/steretic 



On the other hand, the effect of hysteresis is strikingly 

 shown in the initial hyst'eretic curve of I in a low field as 

 the temperature is raised. Here I increases until a near 

 approach to the critical temperature and then rapidly falls. 



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On cooling its path is entirely different; it has then the 

 form rather of the anhysteretic curves, but with a larger 

 value for I, under the same field. The paths of these 

 hysteretic curves for iron and nickel are given in Diagrams 

 IV. and VI. respectively. 



