262 Dr. Lees and Mr. Grime on a Compact Apparatus 



Iron wire, No. 34 S.W.GL Z= 26*50 cms., mean diameter 

 •02414 cm. .'. area a of cross-section =-0004577 sq. cm., 



and ^=3*99xl0 10 . 

 a 



Initial 

 stretching 



force 

 in dynes. 



M. 



gr. 



y 



mean, 

 cms. 



M 



y 



y\ 



yx y 



yx 2 -y 2 - 



M, M 



//i y 

 Vi 2 -y 2 ' 



e. 



dynes/sq.cm. 



440 xg 



15-0 



•3755 



3995 '. -1410 













250 



•5310 



4708 -2820 



7-13 



•1410 



50-6 



2-02 Xl0 12 





35-0 



•6479 



5400 -4198 



1405 



•2788 



504 



201 



Iron wire, No. 29 S.W.G. Z = 26'50 cms. 

 •03228 cm. .*. area a of cross-section = 

 gP 



Mean 6=2*01 X 10". 



, mean diameter 

 0008184 sq.cm., 



and J — =2-23x10 



10 





a 

















Initial 















\m x m 





stretching 

 force 



M. 



y 



mean 



M 



y 



f. 



M 1 M 



yx y 



yr-// 2 - 



yx y 

 Vx-y 1 ' 



e. 



dynes/sq.cm. 



in dynes. 



g r - 



cms. 













790 X g 



150 

 25 



•2251 

 •3446 



66-37 



72-54 



•0507 

 •1187 













35 



•4412 



79-33 



•1947 



1296 



•1440 



; 90-0 



200 X10 12 l 





45 



•5219 



86-24 



•2724 



1370 



•1537 



89-2 



1-99 



950 xg 



15-0 

 25 



•1992 

 •3112 



7530 

 80-33 



•0397 

 •0968 







I 







35 



•4053 



86-36 



•1643 



11-06 



1246 



! 88-80 



1-98 xlO 12 





45 



•4845 



92-88 



•2347 



12-55 



•1379 



1 91-02 



2-03 



Steel wire (pianoforte-wire), No. 29 S.W.Gr. 

 mean diameter '03500 cm. .*. area a 



= •000962 sq. cm., and - 9 - =1*88 x 10 10 . 



Mean e = 200xl0 12 . 



Z = 26*40 cms., 

 of cross-section 



Initial 

 stretching 

 1 force 

 in dynes. 



M. 



gr. 



y 



mean, 

 cms. 



M 



y 



y-- 



M, _ M § 



yx y 



yx-y-- 



M, M 

 V\ V 



yi'-y-' 



e. 



dynes/sq.cm. 



1830 xg 



25-0 



•1712 



146-02 



•0293 













35 



•2339 



149-63, -0547 













45 



•2919 



154-16) -0852 



814 



•0559 



146 



2-74 XlO 12 





55 



•3462 



158-861 -1198 



9-23 



•0651 



142 



267 



Mean e = 2"70x 10 12 . 



