Bifilar Property of Twisted Strips. 



783 



Aluminium was also tried and behaved similarly but not 

 quite 1 so satisfactorily. This was expected, as the vibrations 



dC 

 were rapidly damped. The values o£ -^= were read off 



2 b d 

 from the graph, ^ -j being obtained by direct measurement 



of b and I. d l 



2. Case where T = 0. 

 Fig. 4. 



c 



15C77L 



"f 







ictunr c?ns.*\0~ ) 



\ 



I 



/ 



/ 



ht-cm. 







/ 



/ 



1 



/ 

 I 





V$C//L 





! // / ^ 



i 





T ( 



Zcni. 



dynes jue re/") 



The results for paper are shown graphically in fig. 4, 



