Xci. .V-MU1. 



High -Vacuum Pumps with Oil-packed Piston, Kohl's System. 



391 



52909. I ; 10. 



52 904. 1 : 10. 



.ff-vv, r ) 



ii* ' 



52 907. 1 : 9. 



52911. 1:10. 



52,908. Vacuum Pump with Oil-packed Piston and oil non-ivtum valve, Kohl's sysiciii. (Icnnaii * <1 

 Patent; with Hand Lever and with Plate 240 mm diameter and Barometer Gauge 



200 mm high 11. 0. 



">2, !!()!. -- idem, with Fly-wheel, for Hand and Power Drive, without Plate, Figure 10. 0.0 

 2,910. - - idem, with Fly-wheel and with Plate 240 mm diameter and Barometer Gauge 



200 mm high . . . . ' 12.10.0 



Largest Receiver for use with above: No. 53,013 0. 4. 9 



"2.!i 1 1 . - - idem, driven by a ' / 6 th H. P. Electric Motor with worm gearing, motor for 110 volt 



Direct Current, with Starter, without Plate, Figure 22 10.0 



Vacuum Pumps No. 52,90352,910 are specially 

 intended for rapid work in laboratories. 



I 'I. 1)43, 3B52, 

 4711, 4713. 



