296 



Mechanics of Solids (Statics and Dynamics). 



No. 52114 



52 116. 1 : 8. 



52 117. 1 = 8. 



52118. 1:6. 



52120. 1:14. 



52123. 1:10. 



52 124 A. 1:15. 



52.114. Sheet Iron Pendulum (W. D., Figs. 94, 73 B and C [Figs. 87, 66 B and C]), for proving, 

 that the periods of swing are equal for axes parallel to each other at the same distance 



apart from the centre of gravity; the pendulum suspended as in Fig. 51,877, p. 269 0. !.">.(> 



52.115. -- idem, without suspension, assuming that Apparatus No. 51,877 is available . 0. 8.0 



52.116. Pendulum Apparatus (Ilillig's), Figure, for demonstrating the change of velocity 

 of a swinging motion, with stand and adjustable glass plate (Fr. phys. Techn. I, 2, 



Fig. 3460) 4. (i.o 



A load pendulum is suspended on a frame in such manner that it swing* accurately in a plane. 

 The pendulum weight has a spring which can swing easily and -write on a blackened glass plate. (In one 

 side of the frame is an arresting device for releasing the pendulum weight, this devid- l>ein<: arranged 

 -ii ihiit the pen is released simultaneously i>y the lock action. An arresting device ia fitted at the otnei 



side of the frame, for catching the pendulum. The tracing style leaves a waxy line behind it on the 

 glass slali; on the return journey, during which it docs not exert a -u inking motion of itself, it traces 

 an arc. which cuts the sine line. The individual sections on this arc (pendulum line) are the tracks 

 traversed by the pendulum during equal periods and they therefore demonstrate the various pendulum 

 velocities. 



ci. IIL-:I. ii-M. B2->. 

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