556 Mr. Iolo Jones on the Period and Decrement 



The results given in Table I. are. also shown graphically 



in figs. 1-4 . 



Fig-. 1. — Variation of k x with It /L.,. 



1000 



100 



2000 



The general effect upon the damping of the oscillations 

 caused by increasing R 2 /L 3 with the coupling kept constant 

 is shown in fig. 1. With a low coupling such as 0'5, the 

 damping increases rather slowly with increase of Ji 2 /L 2> 

 whilst for greater values of the coupling, the increase is more 

 rapid and also more nearly uniform, the curve for the value 

 P = 095 being almost a straight line. 



The effect of the variation of the coupling upon the de- 

 crement, R 2 /L 2 being kept constant, is shown in fig. 2. The 

 decrement increases with the coupling, more rapidly the 

 closer the coupling. 



Figs. 3 and 4 show the corresponding effects upon the 

 frequency. At any constant value of the coupling the 

 frequency diminishes as the ratio Bs/L 8 increases, the diminu- 

 tion being more rapid the greater the value of the coupling. 

 With a constant value of R 2 /L 2 , the effect of increasing the 

 coupling is to increase the frequency, the rate of increase 

 being greater for the smaller values of H 2 /L 2 . 



