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



323 



7936. 

 7937. 

 7938. 

 7939. 



INCUBATORS, 

 WATER JACKETED 



No. 7936F. 



INCUBATOES, Triple Wall, constructed of heavy polished copper, reenforced at all points 

 subject to strain. The outer walls are covered with a heavy waterproof insulating material 

 bound at the edges by copper trimmings. The walls are triple in construction, forming an 

 inner water jacket surrounded by an air space. The walls of the water jacket are reenforced 

 to prevent bulging due to the water pressure. The outer door is double walled, with beveled 

 edges cushioned with felt to exclude air. The inner door is of plate glass, separated by a dead 

 air space from the outer door, permitting inspection of the contents without cooling the inner 

 chamber. The bottom of the incubator is made conical in shape to distribute the heat and pre- 

 vent it striking at one point. Two openings in the bottom together with a slide ventilator, 

 permit the control of the heated air. The interiors are furnished with woven wire trays with 

 edges bound with copper, supported by brackets riveted to the sides. 



Circulation of air is provided for in the incubating chamber by means of a long pipe which runs 

 through the water space, thus preheating the air. The thorough insulation of the incu- 

 bating chamber by means of a water jacket, an air space and a non-conductive outer cover- 

 ing, makes precise regulations of the temperature an easy matter, whether the heat is fur- 

 nished by gas, oil or the electric current. All incubators are supplied with sheet iron bases to 

 protect from drafts, the doors of which have mica windows through which the flame may be 

 observed. Tubulations are provided for thermometer, thermo-regulator, ventilation and filling. 

 A ga<;e gla?s, open at the top, indicates the amount in the water jacket. A stop-cock enables 

 the water to be cut off from the glass in case it is broken, and a faucet is attached for drain- 

 ing the jacket. Incubators may be obtained without any equipment for heating or regulation 

 by those who already possess such apparatus. 



For gas heating, a Koch safety burner is provided with six feet of metallic tubing, an incu- 

 bator thermometer and a Reichert thermo-regulator, which is connected by a metal tube pass- 

 ing through the air jacket to the burner. The Koch Safety Burner will automatically cut 

 off the gas supply within 15 seconds after the flame is extinguished. 



For oil heating, an oil lamp is supplied, together with a thermo-regulator which operates a 

 damper controlling the escape of the heat or its admission to the incubator. A thermometer 

 is also furnished. 



For electric heating, replaceable heating units are furnished together with a thermo-regulator, 

 relay, incubator thermometer and connecting cord and plug for attachment to any lamp sock- 

 et. Either of the above methods of heating and temperature control will maintain a con- 

 stancy of %C. within the incubating space. These incubators can also be used satisfactorily 

 as raraffine ovens. 



B C D E F G 



19 18 19 19 25 28 



18 30 12 18 30 18 



U 14 9% 914 18 14 



15 30 15 15 30 30 



121121 



141.25 209.75 105.00 121.00 245.00 182.00 



179.75 248.25 120.00 143.00 283.55 220.25 



178.25 248.25 142.00 158.00 283.50 220.50 



Xo. 



Height inside, inches. . 

 Width inside, inches... 

 Depth inside, inches 

 Height of base, inches. 



Xumber of doors 



Without heating equipment. . 

 With gas heating equipment . . 

 With oil heating equipment . . 

 With electric heating equip- 

 ment . 101.00 



12 



9i 



15 



1 



.5 69.50 



8450 



106.50 



In ordering No. 7939, kindly state voltage and nature of current. 



204.00 274.00 158.00 179.75 313.50 249.25 



