Cenco-Nelson High Vacuum Pumps 



Vertical Section 



Horizontal Section 

 through Gears 



No. 1322 



For Use With a Motor of 1/12 to 1/8 h. p. Valuable for FILTRATION. 



Compact and require no attention when in operation. 

 No. 1322. Pump, Cenco-Nelson, Two-stage. Vacuum, 0.1 mm. 



Net $25.00 



No. 1322A. Pump, Cenco-Nelson, Three-stage, with water-jacket. 



Vacuum, 0.05 mm. . ... Net $35.00 



Either Pump Mounted on a Hardwood Base with 110 volt D. C. Motor and 



Belt, extra, $25.00; with 110 volt A. C. Motor and Belt, extra, $35.00 



SEND FOR BULLETIN No. 45B. 



A New Single Walled 

 Drying Oven 



Electrically Heated and Regulated 



DeKhotinsky Type 



Some Features 



New bimetallic thermo-regulator. 

 Difference in temperature between 

 top and bottom shelves 2°C. 



Heating units easily replaceable. 



Contact points properly located. 



Two sizes: 11 x 10 x 12 in. and 

 18x12x14 in. 



SEND FOR BULLETIN No. SOB 



CENTRAL SCIENTIFIC COMPANY 



(Lake Shore Drive, Ohio and Ontario Streets) 

 Ohio Street CHICAGO, U. S. A. 



I 



No. 4868 A (Patented). 



460 East 



