ß ART. 11 -H. XAGAOKA & K. HONDA 



The greatest field (external field — demagnetizing factor x 

 intensity of magnetization) 1 > is about 700 Gauss. For this strength, 

 nearly all the alloys here studied become saturated, so that further 

 increase of the field would have been superfluous. As found by 

 Hopkinson, the magnetization of 25 per cent Ni. is almost nil, while 

 it increases as the content of nickel is increased or decreased. For 

 want of material, the magnetization for percentages of nickel lower 

 than 24.0-1 was not studied. For 29 per cent Ni., the magnetization 

 attains a maximum value, thence to decrease with the increase of nickel. 

 This decrease is, however, of very small amount, so that after reaching 

 a minimum, the magnetization shows rapid increase and tends towards 

 a maximum as the percentage of nickel becomes nearly e<jual to that 

 of iron. Thus the magnetization curve for 4G per cent Ni. lies a little 

 below that for 50.72 per cent Ni The percentage content of nickel, 

 which shows maximum susceptibility, becomes smaller as the field is 

 increased, ultimately tending towards 50 per cent as will be seen in 

 Fig. 2. From this maximum, the susceptibility gradually diminishes, 

 so that the magnetization curves for 36 per cent and 70.32 per cent 

 are nearly coincident, as shown in Fig. 1. In the descending 

 branches of the curves of susceptibility, there is apparently no such 

 singularity as in the ascending portion. An inspection of Fig. 2. 

 will show how the magnetization varies as the percentage of nickel is 

 gradually increased. If is evident that the intensity of magnetization 

 does not follow the law of simple proportion to the specific magnetiza- 

 tions of the respective mêlais. 



1) It is to be noticed that in all of our former experiments, we had taken the demagnetizing 

 factor (=0.836) into account. 



