262 



General Mechanics. 



51 834. 1:12. 



51833. 1:16. 



. 51 832 a. 1:11. 51835. 1:12. 



51,832 a. Force Table (Millikan's), with 3 spring balances, Figure . . 



51.833. Model (No. 1) for combining forces in space, as suggested by Prof. E. Meyer, Figure 

 (Z. d. V. d. I., 53, 1909, pp. 1301 and seq., No. 1, and text-sheet 13, Figs. 13) . 



51.834. Model (No. 21) for the equalisation of rotating Masses, Figure (Prof. B. Meyer's) 

 (Z. d. V. d. I., 53, 1909, pp. 1301 et seq., No. 21, and text-sheet 16, Figs. 56 and 57), 

 for demonstrating the equalisation of locomotive driving axles and the discovery of 

 errors in steam turbines and turbo-generators . ' 



51.835. Cannon (Grimsehl's), Figure, for demonstrating the action of a couple on a freely 

 movable body (Xtschr. f. d. phys. u. chem. U., 17, 1904, pp. L'l et seq.), with plate 

 glass base, clot hoovered; 2 cannons, 2 shots, stand, steel balls, etc 



The action of the couple of forces is demonstrated by the recoil which the centre of gravity of 

 the system of masses undergoes when the double cannon is fired off, the ma.->< - being formed by the 

 ciinnon, a board and a counterpoise. This board rests on steel balls and can be moved in any dire/lion 

 horizontally. Instead of using the double cannon, the single cannon No. 51,837 can be set up on the 

 board for tlie experiment with single forces. 



51.836. Couple of Forces Water Wheel (Grimsehl's) (Ztschr. f. d. phys. u. eheia. U., 17, 1904, 

 p. 322), for demonstrating the independence of the action of one or more couples on 

 their position relative to the n\is ut' rotation of the body, and for comparing the action 

 of various large couples 



51.837. Reaction Cannon ((IriiuseliFs), for demonstrating the action of individual forces on 

 a movable body (Xlsclir. f. d. phys. u. chem. U., 17, J'.KH. p. 3137); to be used in con- 

 junction with the accessories to No. 51,835 



s. d. 

 2. <.<) 



8. 0.0 



10. 0.0 



5.10.0 



3. 0.0 



51,83*. Projectile Apparatus (Lowy's) (\V. I)., Fig. 66 [61]), Figure 



The apparatus is employed for proving that a body thrown in a horizontal line is sinniltai n< 



with the fall of one falling freely. 



0. 5.0 

 0.17.0 



cl. 



a, ma. 



