No. 



Moment of Inertion, Surface Principle, Counteraction, Tops. 



291 



52 080. 1 : 3. 



52 082. 1 : 6. 



52 083. 1 : 3. 



52 084. 1 : 8. 



52.077. Counteraction Apparatus (Fuchs'), for demonstrating the Surface Principle (Ztschr. s. d 

 f. d. phys. u. chem. TL, 15, 1902, p. 218; Fr. phys. Techn. I, 2, Fig. 3277) .... 



52.078. Schmidt's Top, Figs. A and B (W. D., Figs. 89 92 [8285]), with stand and 



suspension 



1. 5.0 



1. 2.0 



52.079. --idem, Figure, in ring, with stand, can also be used suspended from a cord 1. 0. 



52.080. 3 Tops of different sizes, for placing over each other, Figure (Fr. phys. Techn. 



I, 2, Fig. 3248 [I, Fig. 438]) 2. 0.0 



52.081. - - i d e m, with stand and suspension for 1 top, as No. 52,078, and with pointed 

 attachment and brass rod (Fr. phys. Techn. I, 2, Fig. 3249) 2. 8.0 



52.082. Model for explaining the main phenomenon in the Gyroscope, F i g u r o, as suggested 



by Hammerl (Ztschr. f. d. phys. u. chem. U., 1892, p. 68) 



1.10.0 



52,083. Schmidt's Top with Hollow Sphere of sheet iron and with stand, Figure (Fr. phys. 



Techn. I, 2, Fig. 3234 [I, p. 513]) . . . j 1. 4.0 



If it is attempted to place the sphere in another plane, with the moving top, by turning the ! 

 hand, a resistance is felt as if the axis of the top were held firmly in its position by unseen forces. 



52,084. Gyrostat (Gray's) Figure (Fr; phys. Techn. I, 2, Figs. 3235, 3236) 



C. 0.0 



Cl. 605, 806, 607, 

 609, 532, 

 6'J8, 498 j. 19* 



