JOURNAL OP THE COLLEGE_OF SCIENCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN. 



VOL. XIX., ARTICLE 11. 



Magnetization and Magnetostriction of 



Nickel Steels, containing different 



Percentages of Nickel. 



By 



H. Nagaoka, Rigakuhakushi, 



Professor of Physics 



and 



K. Honda, Rigakuhakushi, 



Lecturer in Physics. 



With Plates I— III. 



The results of our experiments 1 ' on the magnetostriction of nickel 

 steels have been discussed by Guillaume 2) and Osmond. 3) The 

 samples, which we had then tested, were only four in number, so that 

 no definite conclusion as regards the effect on magnetostriction by 

 varying the percentage content of nickel could be drawn. Having 

 now examined eight new specimens, 45 we are able to infer how the 

 magnetization and the magnetostriction go on varying as the 

 proportion of nickel to iron is increased. The importance of investigat- 



1) Nagaoka and Honda, Comptes Rendus, 3 Mars, 1002; Journal de physique, Octobre 

 1902. 



2) Guillaume, Comptes Rendus, 3 Mars, L902. 



3) Osmond, Comptes Rendus, 17 Mars, 1002. 



4) Our thanks are due to Mr. Ch. Ed. Guillaume, at whose kind request, the Company 

 of Commentry-Fourcbambault and Decazeville has liberally supplied us with> 

 specimens. 



