470 



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



No. 12882. 



No. 6156. 



C 

 No. 12868. 



D 



E 



STIRRING APPARATUS 



B 



10 



% 

 5 



Me 

 6.50 



C 

 12 



1% 

 8 



Via 

 7.00 



12864. STIRRERS, High Speed Turbine, for use in water baths, etc., where rapid stirring must be 

 maintained. They are compact and efficient, operating without noise or violent disturbance 

 of the water. Especially adapted for use in thermostats, in physical chemistry laboratories 



No A 



Length, inches 8 



Diameter, inches % 



Capacity, liters per minute 5 



Power required to operate, h. p Me 



Each $6.00 



STIRRING APPARATUS, consisting of a three step cone pulley with chuck for holding glass 

 stirring rods, mounted in bracket with rod for attachment to support stand. Diameter of 



largest pulley, 3% inches. For rods up to *,4 inch 4.00 



STIRRING RODS, of glass for use with No. 12866. 



Style A B C D E 



Each 80 .80 1.25 1.00 .80 



STIRRING APPARATUS, Blair's, as used in iron analysis. Complete with stirrers, asbestos 



plate, 6 beakers and covers, without motor 20.00 



STIRRING APPARATUS, Electric, with adjustable bracket, spindle with chuck to hold stirring 

 rods, and three step pulley. Diameter of largest pulley, 3% inches. A rheostat is provided 



12866. 



12868. 



12872. 

 5156. 



for controlling the speed. For rods up to }4 inch. No. 



A B C D 



A.C. D.C. 



For volts ............................................. 110 220 110 220 



Each ................................................ 27.50 31.50 27.50 31.50 



STIRRING RODS, see Glass Rods. 

 STILLS, see Distilling Apparatus. 



STOP-COCKS, ALL KINDS 



to % inch rubber 



12880. STOP-COCKS, Brass, for gas, nickel-plated, with long taper hose end for 

 tubing; male thread for attaching to gas pipe coupling. Not for water. 



Diameter of gas pipe inside, inches .............................. ^4 % l /2 



Size of I. P. thread, inches ..................................... J /4 % % 



Each .......................................................... 40 .50 .60 



12882. STOP-COCKS, Brass, for gas, same as No. 12880, but with female thread for attaching to gas pipe. 



Diameter of gas pipe inside, inches .............................. % % % 



Size of I. P. thread, inches ..................................... Vt % % 



Each . ............................ 40 .50 .60 



