No. 52512. 



Buoyancy. Communicating Tubes. Archimedi's Principle. 



52 508. 



52501. 1:12. 



52 509. 1:1. 



52503. 1:10. 52504. 1: 10. 



52505. 1 : 10. 



52 512. 1 : 8. 



52.508. Apparatus for proving the Archimedian Law, Figure 



The apparatus consists of 1 wide glass vessel and 1 glass cylinder 250 mm long, into which a 

 50 mm wide hollow brass cylinder fits so as to be liquid-tight. If the cylinder is sunk in a vessel 

 containing water, the piston is raised up, and it should now be noted that the piston is hollow, but 

 is heavier than the water which it displaces. The action of the suction pump can also be explained 

 with the apparatus. 



52.509. Solid and Hollow Cylinders for explaining the Archimedian Principle, Figure (M. 

 P. I, Figs. 375, 376 [373, 374]) 



52.510. idem, smaller 



52.511. Apparatus for explaining the Archimedian Principle, after Weinhold, Figure, in 

 order to enable the experiment to be made with dissymmetrically shaped bodies as 

 well (W. D., Fig. Ill [100]; Ztsohr. f. d. phys. u. chem. U. 2, 1888/1889, p. 35) . . 



Metal Cube with Hollow Cube: see Nos. 51,51151,513, p. 230. 



52.512. Apparatus for demonstrating the Archimedian Principle, after Sire, Figure (Carls 

 Eepertorium 10, p. 451) 



The apparatus comprises: 1 flat balance with upper dish, 1 stand with 2 beakers and carrier (ad- 

 justable) for the body to be immersed; 1 overflow vessel and 1 discharge vessel with cock. It is pos- 

 sible to show with the apparatus: (1) that a body plunged in a liquid is submitted to an upward 

 pressure which is equal in magnitude to the weight of the quantity of liquid displaced; (2) that the 

 increase of pressure on the bottom of the vessel is equal to the pressure of the liquid on the immersed 

 body; (3) that a body floats when it displaces a volume of water whose weight is just as great as 

 that of the body itself. 



s. d. 

 0.14.0 



0. 10. 



0. 8.0 



0. 9.0 

 3. 5.0 



Hydrostatic Balances: see Nos. 51,57351,602, pp. 236240. 



Cl. 746, 5774, 747, 748, 

 5821, 749. 



