

Magnetised Iron, fyc., cooled to Temperature of Liquid Air. 71 



300 C., the moment increased, but not to the same maximum as 

 before, and on repeating the cycle of temperature from about 15 C. to 

 300 C., the magnetic moment gradually varied, in the manner shown 

 in fig. 20, and the temperature of maximum magnetic moment 



-Zoo* 



Variation of Magnetic Moment: of A 

 Nickel Steel tfagnet(i9-64%Ni.) 

 with Temperature. 



-^oo ? 



-loo? o ? +100? +100* 



TemperaCure in Degrees Cent/grade. 



+300-' 



gradually shifted upwards to about 56 C. This magnet is, therefore, 

 an interesting case of a sample of steel which, when magnetised, has 

 a maximum magnetic moment at a certain temperature. 





