378 



Equilibrium of Gases. 



No. 52813 



52813. 1 : 14. 



52814. 1:18. 



52 815 A. 1:14. 



52 815 B. 1 : IT, 



52.813. Boyle's (Mariotte's) Law Apparatus, after Friedr. C. G. Miiller, Figure (Ztschr. 

 f. d. phys. u. chem. U. 16, 1903, p. 18; M. T., Fig. 85), can also be used as an Air 

 Thermometer 



The apparatus is for use in conjunction with a vacuum pump. It is possible by this arrangement 

 to generate -over -pressures to 2 atm., while still keeping the construction of the apparatus of a short 

 form. In addition there is the advantage that the pressure gauge tube can be made entirely of glass 

 without the use of rubber connections and that valves can be omitted. 



The horizontally arranged measuring tube is connected by a thick -walled rubber tube with the 

 manometer tube by means of a 3-way cock, which also admits of connecting up to the vacuum pump 

 by a separate attaching tube. 



52.814. - - i d e m, after Pfaundler, Figure, 2.2 m high, with coloured centimeter gra- 

 duation and with adjustable glass rule, 1 m long, resting in the centre of the rail, the glass 

 rule, having etched millimetre graduation. Apparatus can also he used as an Air Thermo- 

 meter 



52.815. Boyle's (Mariotte's) Law Apparatus, large pattern, 2.8 m high, Figure A, with 

 glass vessel and accessories, Figure .B, the use of the latter enabling the apparatus 

 to be used as an Air Thermometer 



52.816. Boyle's (Mariotte's) Law Apparatus, after S/.ekely, Figure, with spring pressure 



4. d. d 



(i. o. (i 



7. 0.0 



gauge and small force pump 



The tubes are suitable for high pressure, lieini; constructed of Jena glass and provided with steel 



Cl. 837, 888, 889, 890. 



14. 0.0 



I, 890. 



