800 



Iv. IIOXDA : ON THE MUTUAL INFLUENCE 



have greater increase of magnetization inweak longitudinal fields 

 than in the former experiment. The large increase of magneti- 

 zation in the weak field h=^2.o C.G.S. nnits mnst partly be 

 dne to this cause. 



It was still a question whether the magnetizations in the 

 longitudinal and transverse directions were equal, as the isotropy 

 of the material was not well ascertained, and moreover the 

 magnetized body was a toroid as regards circular magnetization, 

 while with respect to longitudinal magnetization, it was a hollow 

 cylinder. To settle this point, the magnetizations in these two 

 directions were measured with the following result : 



TABLE VIII. 



The curve of circular magnetization is steeper than that of the 

 longitudinal as seen from Fig. 9 ; hence the increase of circular 

 magnetization in weak fields must be greater than that of longitudi- 

 nal magnetization for the same field strengths for the reason here- 



