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



No. 12784. (Patent Pending.) 



STAINING APPARATUS, Corper-DeKhotinsky, Electrically Heated, as used at the Municipal 

 Tuberculosis Sanitarium of Chicago, a clean and neat device for hot staining and fixing. 

 By its use it is possible to fix smears of sputum, etc., without danger of burning, to 

 stain them without danger of boiling the carbolfuchsin solution and also to avoid drop- 

 ping carbolfuchsin over the laboratory tables and floors. It consists of an asbestos 

 wood frame with base which will stand red heat without destruction. In the bottom is 

 a sliding metal shelf, to be filled with sand for catching any drippings and to aid in reflecting 

 all the heat upward front the heating units, of which there is one for every two sides. These 

 units, which are easily replaceable, are wound with nichrome wire, which is insoluble in boil- 

 ing carbolfuchsin. The slide carriers are nickel-plated brass frames made to fit in the asbes- 

 tos frame at a suitable height above the electrical units. The base is provided with leveling 

 screws. A set of fuses is placed on the apparatus, so that there is no danger from accidental 

 short circuit. The apparatus is made in two sizes, as listed below, and is intended for stand- 

 ard 3x1 inch slides. It consists of heating box, slide carrier, tray, cross test level and five 

 feet of asbestos covered cord and two plugs. Complete with rheostat for close regulation 



of heat. No A B 



For slides 10 20 



12780. For 110 volts $40.00 50.00 



12781. For 220 volts 41.00 51.00 



12782. SLIDE CARRIERS, extra, for Nos. 12780 and 12781. 



No A B 



For slides 10 20 



Each 3.25 4.00 



12784. STAINING APPARATUS, Corper-DeKhotinsky, Electrically Heated and Regulated (Patent 



Pending), constructed for the same purpose as No. 12780, with the addition of the DeKhotinsky 

 Automatic Thermo-Regulating System to facilitate maintaining a constant temperature, which 

 is especially convenient in research work. In addition to its use in fixing and staining, it 

 may be used as a hot plate for evaporating, concentrating, drying and boiling, etc. It is very 

 economical in consumption of electrical energy, requiring only 180 watts to maintain a tem- 

 perature of 180C., over 82 square inches of surface of aluminum plate. For 20 slides. 



No A B C D 



A.C. D.O. 



For volts 110 220 110 220 



Each 92.50 95.00 90.00 92.50 



12785. SLIDE CARRIER, extra; for No. 12784 5.00 



