j:ffi:ct of «tiucss on .■macxi/it/aitox. 



11 



;i (leuroasc. in stroiii;" lielcls, the initial and the cyclic cllcct of load- 

 ing;" nearly coincide with cacli other. ('urves (/)/,., T),, tor cyclic 

 cfVects arc given in Figv. '1 and 4 in magnified scale. Curves 

 (o/,, I1)t as deduced Ironi the initial ellect of {o[„ T)„ are given 

 in full lines in I'^igs. 0, (I and 7 ; they jise and then fall steeply 

 in low held, and afterward decrease slowly, cutting the axis of II 

 at the Villari [ujints. The decrease of magnetization reaches u 

 maximum, and then gradually diminishes tending to approach zero, 

 as the field is increased. This maximum decrease had been an- 

 ticipated from the theory of magnetostriction^' by Professor Nagaoka 

 anil one of us. Curves ('>/,, II)j. as deduced from (Vî/,, T)„ of the 

 cyclic eiiéct rise only slightly in weak fields ; but in strong fields, 

 they nearly coincide with curves (o/,, //);■ for the initial elVect. 

 The following are the numbers obtained by experiments. 



SWEDISH IRON. 



Initial T= 1 5 2 gr.li/unr ; t—\6.^°C. 



1) Xagaokii and Jloiida, .Juiir. h^c. Coll., i:5. i-. (V.i, j'.inu; Phil. Mag. l»- p. .'Mo, lOOil. 



