De Khotinsky 



ELECTRICALLY HEATED AND REGULATED 



INCUBATOR AND DRYING OVEN 



Patent Pending 



No. 4867E. 



4867E. Drying Oven and Incubator. 



The Cabinet, perforated shelves and door are made of asbestos board, which is fire-proof 

 and resistant to the corrosive action of fumes and chemicals, and minimizes the loss of heat 

 by conduction. All the walls are double in construction and filled with magnesia-asbestos 

 packing. No metal frame work which would conduct heat from the inner to the outer walls 

 is used. All cabinets have a polished white enamel finish and are mounted on nickel plated 

 steel bases. 



Heating of the cabinet is effected by means of de Khotinsky standard heating units, 

 which are inserted from the outside, and permit of replacement in case of accidental breakage 

 without stopping service or opening the door. The units are carefully protected by the inner 

 removable bottom of the cabinet. One unit is connected directly to the relay for tempera- 

 ture regulation and the remaining units may be placed in service one by one by means of the 

 switch. The regulating unit will maintain any temperature from 5" to 70° above the sur- 

 rounding temperature according to the setting of the thermo-regulator. Temperatures from 

 70 to 120° C. are obtained by the introduction of a second unit; higher temperatures with the 

 other units. , , x l rr-u 



The Thermo-Regulator action is based on the expansion of mercury m a steel tube. 1 he 

 attached regulating head with glass capillary renders the make and break of the mercury 

 meniscus visible and permits of cleaning without interruption of the service. The regulator 

 may be set for any temperature up to 150° C. or even higher. . 



The Relay is extremely sensitive and operates with 0.4 watt energy consumption. Ihe 

 precision of action of the regulating system is easily iV C, and can be held at xk" C. by 

 careful adjustment. , ^ ., , , x j j j ** u 



The cabinet is provided with cartridge fuses, flexible asbestos covered cord and attach- 

 ment plugs. 



Size inside. 7 in. wide by 6i in. deep by 10 in. high. Conrplete with four eO-watt heating unite for 110 volts D. C. 



current wei » . 



4867F, Dryiag Oven and Incubator. Same as No. 4867E, but 12 in. wide by 11 in. deep by U in. high. Complete 



with four 115-watt heating units for 110 volts D. C current «« oa-"" 



4867G. Drying Oven and Incubator. Same as No. 4867E. but 16 in. wide by 14 in. deep by 19 in. high. Com- 



pletewith four 140-watt heating units for 110 volts D. C current Net 135.0U 



NOTE:— For 220 volte D.C. or 110 volts A.C., add $2.50 to the above prices; for 220 volte A.C. add J5.00. In ordering 

 state voltage, and if A.C. the nxunber of cycles and phase 



Send for Pamphlet 61 describing the De Khotinsky ElectricaUy Heated and Regulated 

 Constant Temperature Devices 



CENTRAL SCIENTIFIC COMPANY 



460 East Ohio Street 



(Lake Shore Drive, Ohio and Ontario Streets) 



CHICAGO U. S. A. 



