Nickel begins to lose suddenly its Magnetic Properties, 



377 



Fig:. 2. 



Fisr. 3. 



■■■EilllilililBl 

 J— M 



It seems from the above table and the curves in fig. 1 that 

 the temperature of maximum permeability is lower the greater 

 the magnetizing force. Thus, for the magnetizing forces 

 4'959, 9'918, and 18*183, we get the temperatures of maxi- 

 mum permeability as 287°, 248°, and 242° C. respectively. 



