4:68 Change in Dimensions caused by Magnetization in L 



ron. 



two legs of a tilting mirror, as in the other experiment. This 

 was placed in a horizontal coil of elliptical cross-section. The 

 demagnetizing force for a specimen of these dimensions is 

 considerable, but the field and the magnetization near the 



















Fig 



. 5. 

























1 

































si 



y 



































*! 



V 



/**" 











'' 























14 



1* 



A 



































m 



r 



































V 



h 



\ 



31 



>0 



5< 



)0 



7( 



MA 

 10 



GNE) 



u /zr , 



10 



r A£Z 



00 



9 AV 



00 



14 



? CI/ 

 00 



16 



00 



10 



> i 



\? 



3 



4 



5 



6 



7 



8 

 MA 



9 



wen 



l( 



c V 



10 1 

 7/fZZJ 



l< 



//v 



•o i; 

 <r.£.s 



50 V 

 FOJt 



tO 1 

 lCUf\ 



50 If 



V£ / 



iO 





i 



\ 



i 





































\ 

































> 





\ 





































\ 







































\ 































» 







\ 







































\ 



























I 



i 









\ 



V 



























* 











\ 



























Lr 













V 







> 



















\ 



t 



2 

























■ — 



— 









No 

 No 



. 1. Cyclic curve in low fields, well-annealed specimen. 



. 2. Upward curve in high fields of same to tV horizontal scale. 



middle part are both sufficiently uniform. With this I 

 obtained cyclic change of width curves of the reverse cha- 

 racter to those for change of length, the changes being about 

 half in amount ; but the variation with different adjustments 

 was so great that they are without value. I hope, however, 

 to take up this subject again. 



These experiments were performed in the Cavendish 

 Laboratory, and I am glad to be able to express here ^ my 

 most hearty thanks to Professor Thomson for the facilities 

 and suggestions he has given me. 



