60 ART. 6. — K. HONDA AND S. SHIMIZU. 



From these values, the curves of magnetization to temperature 

 are obtained and drawn in Fig. 7 e, f, g, h, i, j, k. In these 

 figures, we have included the results obtained in the first and 

 second experiments. 



Here we also notice that except with 28.74^, the magnetiza- 

 bility of these alloys had considerably changed by the heating and 

 cooling, which the alloys underwent since the first experiment. 

 Hence in some of the figures, the portions corresponding to the 

 first experiment were displaced parallel to themselves so as to 

 form closed curves. Thus the displaced portions are given in 

 dotted lines. 



As the temperature gradually rises from — 186°C, the mag- 

 netization of 29.249^ Ni diminishes at first slowly, then rapidly, 

 and after passing through an inflexion point, the diminution 

 becomes slow. The curve, passing through a second inflexion 

 point, begins to descend very rapidly, as the critical temperature 

 is approached. If this temperature be passed, the diminution of 

 the magnetization by heating is very small, so that the curve is 

 nearly parallel to the axis of temperature. From the course of the 

 curve, it seems probable that the magnetization does not altogether 

 vanish, till the melting point of the specimen is reached. As 

 the temperature is next gradually reduced, the increase of mag- 

 netization is very small ; this state continues, till the temperature 

 falls to about 100°C ; then the increase becomes very rapid. For 

 example, in H=400 C.G.S., the intensity of magnetization at the 

 descending temperature is only 20 C.G.S. for a temperature of 80°C, 

 but it amounts to 200 for 20°C, and at — 60°C, it increases to 

 790. Thus the magnetization of the specimen displays a remark- 

 able diflerence between the ascending and descending branches of 

 the curve. 



