N... .VJB73. 



Piezometers. Cohesion. Adhesion. Surface Tension. 



361 



52664. 1: 12. 



52 666. 1 : 10. 



52 672. 1 : 4. 



52 668. 1 : 3. 



52 673. 1 : 8. 



52,665. Vacuum Syphon as No. 52,664, with. Mercury and Water Filling 



52,066. -- idem, simple, after Weinhold, Figure (W. D., Fig. 171; Ztschr. f. d. phys. 

 u. chem. U. 17, 1904, p. 152) 



52,667. Cohesion and Adhesion Tube, after Leduc and Sacerdote (Gan.-Man., Figs. 26 and27)> 

 for showing the cohesion and adhesion of liquids, for connecting up to the Vacuum Pump 







52,668. Apparatus for showing that Liquids endeavour to Contract, Figure, but with glass 

 cock (W. D., Fig. 130 [118]) 



2,670. - - idem, simple (W. D., Fig. 128 [116]) 



* 52, 671. Apparatus for demonstrating Surface Tension (W. D., Fig. 131 [119]), U-shaped glass 

 tube with unequal limbs, with stand 



52.672. Apparatus for showing and measuring Surface Tension, Figure (W. u. E. phys. 

 Prakt., Fig. 74) 



The measurement is carried out by observing the degree of ascension in capillary tubes which 

 are fastened on a glass scale by means of a rubber ring. The cubical trough containing the liquid 

 consists of plate glass sheets of 5 cm side. 



52.673. Apparatus after Eebenstorff, for measuring Surface Tension, capillary ascension, 

 Figure (Ztschr. f. d. phys. u. chem. U. 19, 1906, p. 26, Fig. 2) . .' 



The apparatus consists of a manometer for coloured water, a number of capillary tubes together 

 with stand and glasses, and a pressure tube extending in width downwards, with beaker and 

 2 hose pieces each of 15 cm length. 



s. d. 



1. 1.0 



0. 6. 



I 



! 0. 12. 



0. 6. 



0. 1. 



0. 4. 



3. 0. 



# Can be used with the Projection Apparatus. 



Cl. 4023, 3752, 

 820, 4976. 



1. 0. 



827, 



