KFFKLT Ol' STKKSS OX MAtiNKTlZA TIO.V. 4U 



Thus in the case of nickel steels, the change of magnetization 

 by tension does not diifer much for the different orders of 

 straining and magnetizing. So also in the change of elasticity, 

 we found a fair agreement between the values for different orders, 

 especially at high tensions. On the other hnnd, the change of 

 magnetization by twist differs sometimes in a considerable degree 

 for the diflerent orders, while in the change of rigidity, the agree- 

 ment between the values for different orders is generally good, if 

 the tension be large, especially in 28.74 and 70.32 per cent of 

 nickel. In all, alloys, for which the hysteresis effect is small, 

 have also a small difference in the changes of elastic constants 

 by magnetization for the different orders of magnetizing and 

 straining. 



Thus far, we have seen that generally the change of magne- 

 tization by stresses differs more or less with the different orders 

 of applying the magnetic field and the stress. In some cases, the 

 difference is not only quantitative but also qualitative, as for the 

 effect of twist in Swedish iron or in 50.72o/o Ni., if the initial 

 effect of twisting under constant field be compared with the 

 results of maa-netization under constant twist. On the other 

 hand, there are examples of good coincidence as in the case 

 of the tension effect in nickel and 70.32^^ nickel steel. Gene- 

 rally speaking, the tension effect shows a better agreement for 

 the different orders of magnetizing and straining, than for the 

 torsion effect ; and the discrepancy is remarkable in low magnetic 

 fields, as may be expected from the consideration of the hys- 

 teresis effect prominent in that region. 



In our preceding paper, we have remarked, that the depen- 

 dency of the change of elastic constants on the different orders 

 of magnetizing and straining, is probably due to the hysteresis 



