Effect of Stress on Magnetization, 



81 



81 obtained from (I, H) T with that from (SI, T) H for the 

 same values of H and T, the former is found to be numeri- 

 cally a little greater than the latter. The dotted line in fig. 17 

 represents the values of SI as deduced from (I, H) T . 



Nickel. 

 t = U°-6 C. 



T=167 gr./mm. 



T = 1022gr. 



T = 1878gr. 



T = 3588 gr. 



T=5256 gr. 



T = 8680 gr. 



H. 



0-93 



!• 



1 

 H. | I. 



H. 



I. 



H. 



I. 



H. 



I. 



H. 



I. 



9-3 



0-92 



10-0 



0-93 



9-1 



0-86 



50 



1-66 



76 



2-06 



5-8 



1-68 



82-3 



202 



73-9 



1-91 



38-9 



1-76 



11-6 



3-50 



16-7 



441 



12-9 



319 



1476 



3-36 



131-3 



3-24 



91-1 



3-44 



26-8 



6-64 



34-8 



7-78 



23-4 



412 



170-4 



4-02 154-4 



4-43 



115-8 



4-81 



420 



10-76 



60-4 



13-38 



41-7 



662 



216-7 



6-65 191-2 



6-70 



151-6 



7-75 



73-4 



15-96 



93-8 



26-01 



81-5 



10-48 



266-8 



9-66 i 226-5 



10-52 



194-2 



12-14 



115-1 











16-14 



3166 



15-54 j 279-3 



15-72 



237-1 



17-98 



159-3 



26-56 



144-3 







2631 



3730 



26-30 343-0 



26-32 



301-2 



27-18 



214-5 



39-31 



202-8 



39-24 



119-3 



38-88 



413-4 



39-09 



392-4 



3911 



354-6 



39-62 



270-9 



62-9 



291-6 



59-8 



176-2 



62-5 



466-0 



62-9 



444-5 



63-2 



420-8 



63-4 



352-0 



106-3 



392-1 



105-6 



296-8 



133-5 



490-0 



133-9 



491-4 



134-9 



482-8 



138-4 



451-0 



186-1 



460-5 



185-8 



420-0 



205-7 



506-3 



206-1 508-2 



206-8 



502-7 



206-7 



479-7 



211-7 



4708 



227-1 



4495 



269-8 



511-0 



269-9 |515-5 



270-5 



511-6 



270-4 



491-5 



287-0 



487-9 



284-1 



4730 



3666 



514-5 



367-9 J 520-0 

 1 



368-7 



517-6 



367-3 



499-5 



358-9 



495-8 



354-0 



488-7 



(c) Change of Magnetization by Twist under Different 

 Tensions: (81, t) h>t . 



In weak fields the magnetization is increased by twist, 

 but in strong fields it is slightly diminished. As shown in 

 figs. 18 & 19 (PL II.), the curves (SI, r) HjT bend slightly 

 towards the axis of the twist ; the curvatures become less as 

 the tension is increased. Except in weak fields, the initial 

 effect is inconsiderable ; it also becomes less as the tension 

 is increased. 



Curves (Sl { , H) T , from (SI{, t) HjT are drawn in figs. 20 

 and 21 in full lines ; they have steep positive maxima from 

 which the curves slope down gradually to the higher field, 

 cut the axis of H, become negative, and after passing through 

 very inconspicuous negative maxima, very slowly bend 

 towards the axis ; the maxima become flatter with the 

 greater tensions, and the positions of the maxima as well as 

 the points of intersection with the axis move toward higher 

 fields with increasing tension. The course of the curves 

 is thus quite similar to that of curves (S\, H) T in the case 

 of iron. The following tables give some of the numerical 

 data obtained. 



Phil. Mag. S. 6. Vol. 14. No. 79. July 1907. 



G 



