Mercury Vacuum Pumps. 



399 



52 993. 1 : 8. 



> 



53 001. 1 : 6. 



52998. 1:15. 



53000. 1:18. 



52, '.tin. Rotary Mercury High Vacuum Pump as No. 52,992, with 220 volt Direct Current 8 - d - 

 Motor 22.10.0 



,~>o. I :>.">. Water Air Pump of glass, for preliminary exhausting, No. 50,135 0. 3. 6 



51.292. Mercury, chemically pure 1 kg 0. 8. 



52. !97. Rotary Mercury Vacuum Pump, Kohl's System, with rotary Oil Vacuum Pump (as 

 preliminary pump), both driven by one Motor for 110 volts Direct Current, mounted on j 

 baseboard with starter, switch, connecting leads, plug and box plug !32. 10. 



Illustration sent if desired. 



52. 998 Mercury Distilling Apparatus after WeinhoM, Figure, for gas heating; supplies 

 chemically pure, dry mercury and requires no attention (Carls Rep. 15, p. 1) ... 



The Apparatus consists of an oak stand, a Sprengel Mercury Vacuum Pump, the Distilling Appa- 

 ratus with gauz- burner, a ga< pressure regulator, a heat regulator, the necessary bottles, etc.; it works 

 quite automatically for hours and without any loss in mercury. 



Indispensable for those possessing Mercury Vacuum Pumps. 



5u. !>!((. - - i d e m, arranged for heating by Spirit 



Illustration sent on application. 



8. 0.0 



9. 0.0 



2. 2. 



r>:>.noo. -- idem, simpler, on wall board, Figure, with gas ring 



5:5, ooi . Mercury Filtration Apparatus after Wiedemann, F i g u r e, consisting of a stand and 

 funnel with long tube closed bv a piece of wash-leal her (\V. u. E. phys. I'rakt. Fig. 365; 

 Ztschr. f. d. phys. u. chem. U. 4, 1891, p. 255) 0. 8. 



5 1. :;(M. Mercury Press, see Figure 51,304, p. 215 0.12.0 



Cl. 5097, 



95fi, H.1-1, '.!''> 



