CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 513 



No. 14296. 



14296. WATER BATH, DeKhotinsky, Electrically Heated, intended to replace the ordinary Bunscn 

 burner heated bath, in laboratories where electric current is available. The bath consists of 

 a copper container \<, mm (0.02 inch) thick, spun in one piece and nickel-plated. It is lagged 

 with 25 mm (1 inch) of magnesia-asbestos and protected outside by red fiber. The bath is 

 attached to an enameled cast-iron base, fitted with a nickel-plated supporting rod, to which 

 laboratory clamps may be attached for the support of flasks, condensers, etc. The top of the 

 bath is fitted with a set of six porcelain rings to accommodate the different sizes of flasks or 

 evaporating dishes. 



Capacity of bath 1000 cc. Height (without stand) 12.5 cm. 



Volume of container 1400 cc. Height (inside) 9.5 cm. 



Diameter (outside) 19 cm. Height (with stand) 18.5 cm. 



Diameter (inside) 14 cm. Weight lOlbs. 



Four electric heating units of 44 watts each are used to supply heat to the bath. These units may be 

 added one by one, by means of the switch which constitutes a part of the bath, and the desired 

 temperature thus secured. The bath has a constant water level attachment, by means of which 

 the water level may be kept constant at any point within a range of 25 mm (1 inch). The regu- 

 larity of the water level is 1 mm. 



The following table shows the capacity of the bath: 



Number of heating units 3 2 1 



Total energy consumed, watts 132 88 44 



Temperature maintained, C 100 95 72 



With four heating units (176 watts) the boiling is, of course, more rapid. 



As the heating units are inserted in brass tubes placed permanently inside of the bath, 20 mm 

 from the bottom, their heating value come? to 99 per cent, of the theoretical expenditure of 

 energy. Placed as they are, the heating units are absolutely protected from accidental injury. 

 To replace these units takes no more time or skill than to replace an incandescent lamp in its 

 socket. This bath operates on either a direct or alternating current, and may be attached to 

 any Edison socket. Complete as describe.!, without glassware. 



No A E 



For volts 110 220 



Each $27.50 30.00 



HEATING UNITS, extra, for No. 14296, 44 watts each. 



No 7526A 7527A 



For volts 110 220 



Each 1.00 1.25 



