294 



Mechanics of Solids (Statics and Dynamics). 



X... 5! 



52102. 1:12. 



52105. 1:12. 



52 109. 1 : 14. 



52,100. Frame with Pendulums, of. F i g. 51,850, p. 265 (W. D., Fig. 93 [86]), with 3 brass 

 balls and 1 wood ball on double threads 



52.101. 4 Pendulums, as No. 52,100, separately, for use with frame No. 51,151 



52.102. Pendulum Frame (Friedr. C. G. Miiller's), Figure, with 4 brass balls, 2 of these 

 with 2 hooks and 2 with 1; 1 wood ball with hook; 1 lead ball with hook; 1 bearing 

 for reversing pendulums; 1 knife-edge for disc pendulums, wire figures, etc.; 1 angle 

 piece; 4 spiral springs for demonstrating the spring pendulum; 1 physical and 1 re- 

 versing pendulum; 1 disc pendulum (M. T., Figs. 46 and 51) 



52.103. Pendulum for explaining the Laws of the Pendulum, simple type, iron rod, graduated, 

 with adjustable bob and wall arm 



5LM04. Maxwell's Pendulum 



The pendulum consists of a rod 80 cm in length, the upper end of which can turn about an 

 axis. A cord can be wound round this axis and a metal ball suspended from the cord, so that tin- 

 periodicity of both pendulums can be made to coincide. 



52.105. Pendulum with directly measurable length, Figure, Grimsehl's (Ztschr. f. d. phys. 

 u. chem. U., 18, 1905, p. 36) 



The pendulum has two knife-edges, 1m apart; the, pendulum is hung upon the- upper knife - 

 edg<-, tin- hob resting at its centre of gravity on the lower one, thus the pendulum only undergoes 

 a translatory, small circular motion when swung. The moment of insertia of the disc is negligible 

 when the pendulum is swinging. The pendulum accordingly swings like a mathematical pendulum 

 the length of which is equal to the distance between the two knife-edges. 



52.106. Compensating Pendulum, on stand, pendulum 0.5 m long: see No. 51.<J!t:>;i . . . 



52.107. - - idem, with 9 brass and steel rods, beating l / seconds: see Fig. 51,695, p. 215 



Kindly compare the Pendulum Stands for fitting to the Lecture Tables Nos. 50.097 and 50,098, pp. 18 and 19, 



Frame No. 51,151, p. 206, and 51.851, p. 265. 



For Seconds Pendulums, see Section --Measurement of Time", pp. '24.', and -Mil. 



s. d. 

 0.15.0 



0. 3.0 



3. 4.0 



0. 18. 

 0.12.0 



5.10.0 



1. 4.0 

 2. 10. 

 and the 



I, .Mm',, r.lli 



