



Variably Coupled Vibration 



s. 







3( 



7 75 



70 



Fig. 2. 



























65 

 60 











































55 













/ 











50 

 45 













/ 































40 



35 























30 

 25 











































20 

























15 



























10 

























5 





















































1 



■2 



3 



•4 



•5 



6 C 



•7 







8 



•9 i 

 OL 



IV. Experimental Arrangement and Results. 



The actual experimental arrangement used is illustrated in 

 fig. 4. It consists of a lath L clamped at A and carrying a 

 bob X. The gravity pendulum M is attached to L at P, 

 P being movable. The bob M is of special construction. 

 It enables a spot of light to be focussed on a naked photo- 

 graphic plate B, which is moved by hand in a frame between 



