o^Soc. Edin. Vol. XXXVIII 



if Barton on the Temperature Variation of the Magnetic Permeability of Magnetite. 



Plate 111. 



Curve (VI). 



Curve (VII). 



Ordinates proportional to /c' 



BEING PRODUCTS OF THOSE IN CURVES (IV) AND (V) 



r 



100° 200 800 400 u 500 



Temperatures of Magnetite. 



z -30 



< 



a .20 



0-00 

 600" C. 0° C. 



SHOWING ABSOLUTE SUSCEPTIBILITIES. 



TRUE /f, APPARENT K~. 









\k 





















Kr" 





















^.-**** 



\ 













----'* 



K' » v 

















"* v 



\ \ 

 \\ 

 U 















100 200 300 400 SOO 



Temperatures of Magnetite. 



600 C. 



Curve (VIII). 



o c. 



SHOWING PERMEABILITIES. 



6-0 

















U. 





 CO 

 HI 



3 

 J 



< 































HI 

 H 

 3 

 J 

 O 

 07 

 

































00 

















100 200 300 400 SOO 



Temperatures of Magnetite. 



600 C 



