298 Dr. Richardson and Mr. Laws on Changes in the Magnetic 



become smoother and smoother, and the second maximum 

 very soon disappears altogether. 



A new maximum, however, begins to develop between 

 500° C. and 600° C. This maximum will be seen clearly in 

 curve VII. 



The following particulars will enable the changes taking 

 place to be followed by the reader. 



Fi-. 1. 



9000 



8000 



7000 



6000 



5000 



4000 



3000 



2000 



1000 



O 100 200 



Figure 1. 



Curve I. — This curve was obtained from observations taken 

 during the 6th heating. It is shown as a dotted line 

 because great dependence cannot be placed on the nume- 

 rical values of the temperatures. The three maxima 

 first observed can be seen on this curve. 



Curve LL (9th heating) . — This curve also exhibits the three 

 maxima. 



Curve III. (11th heating). — The second maximum has dis- 

 appeared. 

 Curve IV. (10th cooling). — In no case was the cooling and 



