BETWEEN- LONGITUDIXAL AXD CIRCULAR MAGNETIZATIONS. 299 



TABLE VII. 



To calculate H, wo must subtract from the external field 

 the demagnetizing force corresponding to the intensity of mag- 

 netization when tlio circular field is acting ; but in the above 

 table, I only took account of the demagnetizing force corres- 

 ponding to no circular field, so that there will l)e some 

 difference in the value of H. 



From the above table, we see that the general nature of 

 the change of magnetization is the same as that already described. 

 In the present case, the demagnetizing force in the direction of 

 circular magnetizing field does not exist, and therefore h remains 

 constant during the application of longitudinal field ; hence we must 



