322 



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



7918. ELECTRIC HEATING DEVICE for electrifying small incubators, similar to No. 7916, but 

 smaller, with two special 8 candle power lamps mounted on a % fi inch transite base with 

 thermostat, protected from above by a shelf of transite. Method of installing is the same 

 as for No. 7916. Height of heating device, 3 inches; length, 4V 2 inches; width, 5 inches. 

 Complete with attachment cord and plug, for 110 volts $13.75 



7920. ELECTRIC HEATING DEVICE for large incubators, consisting of two 16-candle power incan- 

 descent lamps protected by metal chimneys and Electro-Thermostat No. 13756, wired together 

 with attachment plug and cord ready to install. The method of installing is the same as given 

 under No. 7916. This equipment can be used successfully in incubating chambers not exceed- 

 ing 8200 cubic inches in cubical space. Weight packed for shipment, 12 pounds. For 110 

 volts 20.00 



ELECTRIC HEATING PLATES, for use in Incubators No. 7908 and 7909 in place of carbon 

 lamps with chimneys, where a dark chamber is desired. The heater consists of a plate of 

 transite mounted on porcelain legs, on the under side of which are mounted a sufficient num- 

 ber of Heating Units No. 7926D to maintain a temperature of 37y 2 C. Units are easily re- 

 movable and replaceable in case of injury. A pilot lamp is mounted in the circuit. 



No A B C D E F G H J 



For incubator, No.... 2 3 11 12 1.3 31 32 33 41 



For 110 volts 8.25 4.50 6.50 8.25 8.25 8.25 8.25 8.25 8.25 



For 220 volts.. 8.25 4.50 6.50 8.25 8.25 8.25 8.25 8.25 8.25 



7922. 

 7923. 



7926. 



ELECTRIC HEATING STOVES and UNITS for electrifying gas heated incubators. These are 

 for permanent installation and should be installed and wired by an experienced electrician. 

 They should be used with Electro-Thermostat No. 13756 for temperature control. They con- 

 sist of resistance wire wound on an insulating medium, and in the case of Nos. A, B and C 

 are mounted on transite base and protected by a perforated metal shield. No. E is intended 

 to be used with clips, such as are used for fuses. No. D can be attached by means of binding 

 posts. All are wound for use on 110 volts. * 



No 



Size of heater, inches. 

 Capacity, amperes 

 Becommended use. . . . 



Each 



A 



14x5x3% 

 % to 3 

 incubating 

 rooms 



12.00 



B 



9x3 %x3 

 % to 3 

 large incuba- 

 tors and 

 incubating 

 rooms 

 10.00 



C 

 9x2 



small 

 incubators 



5.00 



small and 



medium sized 



incubators 



1.00 



E 



1 to iy. 2 

 sterilizers 



2.25 



