652 Messrs. K. Honda and S. Slrimizu on 



Nickel- Steel 36 per cent. (cont.). 



*=218° C. 



* = 182° C. 



^=145° C. 



^ = 10°0O. 



H. 



I. 



H. 



I. 



H. 



I. 



H. 



I. 



30-5 



77-4 

 160-2 

 320 

 481 



14-7 

 23 9 

 35-5 

 553 

 70-6 



0-26 

 1-54 



8-08 

 20-58 

 714 



250-7 



447 



54 

 198 

 335 

 364 

 379 

 391 

 401 



0-21 

 0-46 

 1-51 

 6-46 

 496 

 151-4 

 292-3 

 428 



42 

 127 



242 

 459 

 582 

 592 

 597 

 602 



0-31 

 0-71 

 1-66 



4-88 

 16-15 

 1121 

 247*9 

 302 

 375 



32 



118 



314 



556 



801 



1013 



1027 



1028 



1029 



Comparing the above values for ordinary temperature with 

 the corresponding values in the first series, we notice that 

 except with 36 per cent, nickel-steel, the magnetizability o£ 

 these alloys had slightly changed by the repeated heating 

 and cooling which the alloys had undergone since the end of 

 the first series. 



From these results, the temperature-curves of magneti- 

 zation are obtained and given in figs. 7 a, b, c, d (PI. XII,). 

 In these figures we have also included the results obtained in 

 our first and second series of experiments. As seen from the 

 figures, the diminution of magnetization, after the critical 

 point is reached, is very slight ; and to judge from the course 

 of the curve it seems probable that the magnetization does 

 not altogether vanish till the melting-points are reached. 



The curves of magnetization at a constant field in the 

 ascending and descending stages of temperature do not 

 exactly coincide with each other when the range of tem- 

 perature is large, the two curves thus enclosing a small area 

 between them. 



As the critical points of these nickel-steels for 11 = 400, 

 we give the following values : — 



Alloys 



70-32 %. 



50-72 %. 



46 7 . 



36 %. 

 255° C. 





Ascending branch 



660° C. 



490° C. 



412° C. 









460° C. 



395 c C. 



240° C. 





These values nearly coincide with those of M. Osmond 

 and L. Dumas. Thus the critical point falls with the per- 

 centage content of nickel. 



