154 Magnetic Properties of Alloys of Iron and Aluminium. 



Suppose, for instance, A f , W are the curves obtained by 

 plotting the parts of the induction contributed by each medium 

 independently against the temperature for any given value 

 of H ; then the curve (7 obtained by adding the ordinates 

 will represent the observed B and T curve for the alloy in 

 question. 



Fig. 21. 



The value of /3 for this curve, which approximates to the 

 maximum value of the ordinate of the curve A', would then 

 be connected with H by a curve similar to a B and H curve. 



This result is in agreement with the curves actually obtained 

 from the experiments. 



It is intended very shortly to publish an account of some 

 further experiments on the changes of hysteresis as the tem- 

 perature rises, and on the behaviour of the alloys during 

 cooling. 



In conclusion, the author's best thanks are due to Mr. Dawe, 

 F.I.C., Chemist to the Ebbw Yale Ironworks, for his kindness 

 in making the very complete analyses of the alloys, and to 

 Prof. J. J. Thomson for suggestions and encouragement 

 during the progress of the work. 



University College, Nottingham, 



