562 



Mr. Iolo Jones on the Period and Decrement 

 Table VII. 

 F = 0-95. 

 R,/Li = 0, Lid = 7*66 . 10- s c.g.s. 



RJL,. 



fc i- 



//. 



'd. 











257171 







500 



4547-28 



243320 



509-43 



1000 



9457-28 



1956-50 



1085-44 



1500 



14059*33 



516-67 



1881-34 



2000 



3780-90 



214-35 



32438-19 



2500 



2777-40 



421-14 



44457-21 



3000 



222306 



481-66 



55553-88 



4U00 



1611-92 



527-65 



7677627 



Figs. 5-8 show the curves o£ variation of n with R2/L2 lor 

 different values of the coupling in the neighbourhood of the 

 limiting value 0889. Fig. 5 is the curve for /: 2 = 07. At 

 this coupling the frequency diminishes, but not uniformly so, 

 as E 2 /L 2 increases. At & 9 = # 85 (fig. 6) the curve shows a 



Fig. 5. 



1000 



750 



500 



400 





















k 8 = 0-7 































1000 



2000 



3000 



4000 5000 6000 



minimum frequency at R2/L2 nearly equal to 2400. The bend 

 in the curve at this point develops into a double point in the 

 curve for A: 2 = 0*889, the limiting value, as shown in fig. 7. 

 For values of k 2 above this limiting value, the curve breaks 

 up into two distinct portions as shown in fig. 8, the curve 

 for P= 0-95. 



