Magnetic Properties of Pure Iron. 



229 



K 1. 



Kesistance of secondary = 075 ohm. Temperature, 10'5 C. (pure specimen, 



marked x ) . 



Temperature, 8'5 C. (ordinary specimen, marked Q). 



Figs, 2, 3, 4, and 5 give the curves taken at the following tempera- 

 tures, as calculated from the secondary resistances 658 (676 C ), 727 

 (738), 770 (780), 855 (857). 



The values for these curves are as follows : 



