CENTRAL SCIENTIFIC CO., CHICAGO. U. S. A. 



139 



2670. 



2672. 

 2674. 



2676. 



2677. 

 2678. 

 2679. 

 2680. 

 2681. 

 2082. 



2683. 



Nos. 2670-6. 



CENTRIFUGES, INTERNATIONAL 



INTERNATIONAL CENTRIFUGES are so well known as to need no comment. The ones listed 

 below are those which have proved most adapted to laboratory needs and will cover practically 

 every requirement of the scientific worker. They are carried in stock for prompt shipment. 

 Prices upon any others not listed will be furnished upon request, and deliveries can be made 

 within a reasonable length of time. 



The centrifuges are mounted in a heavy bell shaped casting which furnishes at the same time a 

 rigid base, a protective housing and a strong bearing for the motor. Ample provision is made 

 for oiling. The lower end of the shaft of the motor runs on a ball step immersed in oiL A 

 speed control rheostat is supplied with each centrifuge. 



The prices of the centrifuges whose description follows, do not include heads or equipment. 

 Select the ones adapted to your needs from the list of accessories. We carry in stock parts 

 for which there is the greatest demand. Other types or parts will be obtained upon short 

 notice. 



CENTRIFUGE, International No. 1, Type B, for 110 volts alternating current. With rheostat 

 for speed control, but without heads or tubes. 



Specifications: 



Height, cover closed, 23 inches. 



Height, cover open, 33 inches. 



Diameter, 17 inches. 



Shipping weight, about 270 pounds. 



Speed with four-tube 15 ce head and tubes, 



3600 r. p. m. 



Relative force times gravity, 2015. 

 Average spread, 28 cm. 



Speed with eight-tube 50 cc head and tubes, 



3000 r. p. m. 

 Relative force, 1600. 

 Average spread, 32 cm. 

 Speed with Board of Health Head, 3000 



r. p. m. 



Relative force, 900. 

 Average spread, 18 cm. 



Price $117.60 



CENTRIFUGE, International No. 1, Type B, 



current 



CENTRIFUGE, International No. 1, Type B, 



speed control but without heads or tubes. 

 Specifications : 



Height, cover closed, 18 inches. 



Height, cover open, 28 inches. 



Diameter, 17 inches. 



Shipping weight, about 160 pounds. 



Speed with four-tube 15 cc head and tubes, 

 4000 r. p. m. 



Relative force times gravity, 2491. 



Average spread, 28 cm. 



Price . 



same as No. 2670, but for 220 volts alternating 



117.60 



for 110 volts direct current. With rheostat for 



Speed with eight-tube 50 cc head and tubes, 



3000 r. p. m. 



Relative force times gravity, 1600. 

 Average spread, 32 cm. 

 Speed with Board of Health Head, 3000 



r. p. m. 



Relative force, 900. 

 Average spread, 18 cm. 



102.00 



CENTRIFUGE, International No 1, Type B, same as No. 2674, but for 220 volts direct 



current 105.60 



Accessories for International Centrifuge No. 1, Type B. 



Two-Tube 15 cc Head and attached trunnion rings 3.60 



Four-Tube 15 cc Head and attached trunnion rings 8.40 



Eight-Tube 15 cc Head and attached trunnion rings 14.40 



Two-Tube 50 cc Head only without trunnion rings 4.20 



Four-Tube 50 cc Head only without trunnion rings 8.40 



Four- Tube Combination Head, with two attached 15 cc trunnion rings only and places for two 



50 cc trunnion rings 8.40 



Eight-Tube Combination Head, with four attached 15 cc trunnion rings only and places for four 



50 cc trunnion rings ' 15.60 



