liÈïWEEN LONGITUDINAL AND CIRCULAll :\rAGNETlZATIONS. o03 



Tlie remarkable difference between iron and nickel lies in 

 tlie field strength at which the increase of magnetization reaches 

 a maximum. Such a field in nickel is, in the present experiment, 

 greater than 35 C.G.S nnits in weak longitudinal fields, while in 

 iron it is about 4 C.G.8. units. 



Next I shall describe the result of experiments on the efiect 

 of longitudinal field upon the transverse intensity of magnetiza- 

 tion measured by the ballistic method. Proceeding as in the 

 case of iron, I obtained the following numbers: 



TABLE XL 



Here, in the calculation of II, the demagnetizing force 

 corresponding to the magnetization with no circular field was 

 only taken into account as in the case of iron. 



Tlie general feature of the change of magnetization is the same 

 as in the former experiment. In this case, however, the increase 

 in weak fields is generally small. As was the case with iron, thg 



