TEMPERATURE OK THE MAGNETIZATION OF STEELS, ETC. U 



the opposite tendency. Retaining these features up toaboul ( .»0<» , 

 the rate of the fall of magnetization with a still further increase 

 of temperature becomes very great, and the curve of magnetization 

 at 1140° lies flat along the axis of null magnetization. 



One of us had already shown that east cobalt undergoi - 

 remarkable changes by annealing both as regards magnetization 

 and magnetostriction. The specimen here experimented upon was 

 an annealed ovoid ; it showed that successive heatings produce 

 small changes, so that after cooling the metal the curve of 

 magnetization is slightly displaced as shown in the figure. 



The following table contains the results of observations. 



