Elasticity of Ferromagnetic Substances by Magnetization. 5 t 



The observed change of elasticity is generally similar to 

 that for 50*7:2 per cent. Xi, but is less in amount, as shown 

 in Table XX. and in full Hues in fig. 18. 



Table XX. 







AT=±8C 



5 gr./ 



mm. 2 



t = V 



°-2 C. 



T = 808 gr./mm.2 



T=i6< 



'1 gr./mm. 2 



T = 327 



7 gr./mui. 2 



T=4862 gr. mi:i.- 





•3E , n 





*E 



oE 





cE 



H. 



r XI0-. 

 ij n 



H. 



v xio-. 



H. 



, xio 2 . 



H. 



.,- XlO-\ 



0-7 



-0 14 



07 



-0(18 



0-7 



+048 



06 



-001 



... 





3-0 



--1-17 



2-6 



040 



08 



+005 



6-6 



+2-45 



53 



1-92 



47 



053 



3-8 



030 



0-7 



3-57 



96 



25-2 



12-0 



1-07 



120 



045 



19-9 



4!3 



411 



3 '33 



261 



T35 



251 



060 



41-8 



4-51 



68-9 



3-38 



534 



1-42 



527 



0-68 



70-8 



4-71 



136-3 



3-45 



98-8 



] 55 



98-8 



0-70 



1773 



492 



226 



372 



1930 



1-50 



192-6 



070 



260 



492 



309 



369 



285 



1-57 



284 



0-78 



386 



4-9L' 



388 



374 



393 



1 -53 



393 



070 



The calculated values of 



E 



are oenerallv greater than 



the above values, the difference being less for greater tensions, 

 as seen in Table XXI. and fig. 18 with dotted lines. The 



difference almost vanishes for 



:ension of 3 kg. 



Table XXI. 

 AT= 4-805 or. mm- 



T = 800gr. mm.- T = 1671gr. min. 2 |T = 3277 gr./min."T= 4882 gr./mm. 2 



K. 



X 10 s . 



xio-. 



oE 



Ml 



xio-. 



vK 



xio- 



•li 



5 



4-09 



10 



031 



100 



743 . 



200 



. 713 



300 



715 



240 

 3'12 

 425 

 428 

 4-29 



0-75 



100 

 145 

 1-37 



1-45 



032 

 045 



0-55 

 0-55 

 0-53 





From the above results for nickel-steels, we may conclude 



that, for small tensions, the change of elasticity is considerably 



less than that calculated from the tension effect on the 



maonetic change of length. But the difference between the 



i ... 



two becomes less and less as the tension is increased, almost 



vanishing for great tensions. 



