24 



ART. S.— H. XAGAOKA AXD K. HONDA 



In weak fields, the cliaiige is very small, but the rate is tolerably 

 large ; as the field increases, the curve (Fig. 7, PL II.) reaches an 

 inflexion jjoint. The change goes on somewhat slowly for fields 

 amounting to a lew hundred units ; it again reaches an inflexion 

 point, whence to increase steadily and almost at a constant rate as 

 the field is further increased. 



Nîcht'L In our two former experiments, we noticed a discre- 

 pancy in the nature of the volume change in this metal. With a 

 bar of square section, we noticed a diminution, while an ovoid 

 «bowed an increase. How this may be easily accounted for, ^^'e have 

 already discussed in (nir former paper, so that it ^vill be now^ un- 

 necessary to take up the subject anew. 



With the present specimen, which may be regarded as the more 

 homogeneous, we noticed a slight increase of volume, which is of about 

 the same amount as that observed in the former experiments. 



The character of the change is similar to that in steel, the curve 

 (Fig. 7.) of the change presenting two inflexional points. These 

 points do not appear in such a remarkable degree as in steel, but 

 their where abouts can be ascertained at a glance. The observed 

 changes in volume are given below : — 



