290 



Mechanics of Solids (Statics and Dynamics). 



No. 52U7:; 



52 075 A. 1:10. 



52 073. 1 : 5. 



52 076. 1 : 13. 





52 075 B. 1 : 30. 



52.072. Pendulum for Moment of Inertia (Weinhold's) (W. D., p. 112 [104]), iron rod with * <' 

 axis in the centre, with 2 bobs each 0.981 kg and 3 bobs each 0.245 kg in weight, with 



iron stand and Cardan suspension 2. M.o 



52.073. Apparatus for determining the Moment of Inertia by means of torsional oscillations, 

 Figure (W. u. E. phys. Prakt., Fig. 66), for mirror-reading 2. o. u 



The duration of oscillation of the system is observed by means of a telescope \vith cross wires. 

 first with these bodies, and then without them. 



This apparatus is employed in conjunction with a massive frame,, e. ., N'o. .">:_'. 195. 



52.074. Moment of Inertia Apparatus (Grimsehl's) (Verh. d. Physikal. Gesellsch. VI, 



Nos. 1519; Ztschr. f. d. phys. u. ehem. U., 18, 1905, p. 35) 4. n.o 



The discs, arranged so as to rotate, only execute translatory motions when the system is in 

 oscillation; if the discs are firmly fixed, the total mass only of the system is taken into consideration 

 in determining the moment of inertia. 



52.075. Rotating Disc and Weighted Bar, as suggested by Prof. L. Prandtl, Figs. A and B, 

 for showing the relations between Angular Velocity and Moment of Inertia (Ztschr. d. 

 Vercins dcutscher Ingenieure, 1909, pp. 1301 et sc<|.. No. 16, and Figs. 46 and 47 on 

 text-page 16) 5.1o.o 



52.076. Apparatus for the Surface Principle, as suggested b\ I'rol. Hug. Meyer, Figure. 

 for proving that a rotating mass imparts in an opposite din-el ion an angular velocity 

 in a co-axial ly rotary mass, this angular velocity corri->pomliiiir to the ratio of the moment 

 of inertia. With 110 volt D. ('. motor (ZtBChr. d. V. d. I., 53, iw.i. pp. 1303 et wq., 



Xo. 17. and text-sheet 16, Fig. 48) 8. 0.0 



Cl 51*. 



.Miii'.i. 55511. 



