Dr. J. Hopkinson. 



CURVE 14. 

 33 per cent. Nickel. 



S 



6000 - 



CUEVE 15. 

 Magnetising Force, TO. 



In Curve 14 is given the relation of induction and force at the ordi- 

 nary temperature, and in Curves 15 and 16 the relation of induction 

 and temperature for forces TO and 30'3. The remarkable feature of 

 this material is the complete difference from the last but one, and the 

 low temperature of change. There is but very little difference 

 between the temperatures of change when heated and when cooled. 

 H. The analysis of this sample, as furnished by Mr. Riley, is 



Fe. 

 26-50 



Ni. 

 73-0 



c. 



0-18 



Mn. 

 0-30 



S. 



o-oi 



p. 



O'Ol per cent. 



In Curve 17 is given the relation of induction and force at the ordi- 



