372 



Equilibrium of Gases. 



No. 52 765 - 



52 766. 

 1 : 14. 



52767. 

 1 : 12. 



52774. 

 1 : 10. 



52776. 

 1: 10. 



52777. 

 1 : 10. 



52.765. Duplex Barometer, after Kleiber, with two tubes connected under the mercury level | 

 (Fr. phys. Techn. I, 2, Fig. 2560; Ztschr. f. d. phys. u. chem. U. 14, 1901, p. 247. 

 Fig. 2) 



52.766. Apparatus for the Torricellian Experiment, after Dechant, Figure, can also be 

 used as an open or a closed Manometer 



The U-tube is filled with a sufficient quantity of mercury, and for demonstrating the baro- 

 meter, the apparatus, with stopcock open, is inclined to the right until mercury flows out of the cock; 

 the cock is then closed and the apparatus placed upright. 



52.767. Demonstration Barometer, after Schulze, Figure, with 3 glass stopcocks . . . 



Suitable for showing air-pressure and Marietta's Law. 



52.768. Experimental Barometer, after Friedr. C. G. Miiller (M. T., Fig. 84), can also be used 

 as a Vacuum Gauge, with plain millimetre and centimetre graduation 



52.769. Simple School Model of Barometer, with Fortin Vessel (Kleiber, Lehrb. f. Gymnasien. 

 Fig. 114), without mercury 



52.770. --idem, of Syphon Barometer, with U-tube (Kleiber, Lehrb. f. Gymn., Fig. 115 a), 

 without mercury 



52.771. Barometer, simple, on board with milk glass scale 



52.772. Barometer, English form, Figure, ivory scale with vernier 



52.773. Standard Barometer, after Regnault (Gan.-Man., Fig. 141), for rending with the catheto- 



ineler, with tube 2.5 cm wide and iron cistern 



52,774. Barometer, on finely polished board, Figure, the sight vane adjusted by rack and 



pinion, with 2 thermometers 



52,775. - - idem, sight-vane without rack motion 



s. d. 

 0.12.0 



1. 2.0 



1.10.0 



1. It), o 



0. is. o 



0.12.0 

 0.12.0 



2. d. d 



8. d. II 



2. d. d 



1. ID. It 



Cl. 5363, 852, 859, 5061, 860, 5339. 



