THE EUTECTOID TRANSITION POINT OF CAEBON STEELS. 



185 



In the stronger field however, the effect of the return of magnetisability, at the 

 same temperature, is much more pronounced than in the earlier experiments. 



550' 



800C 



These differences are no doubt due to the fact that in weak fields the susceptibility of 

 the iron in the eutectoid is much smaller compared with that of the excess iron than 

 it is in strong fields. 



VOL. ccxv. A. 2 B 



