190 



POULTRY PRODUCTION 



from vermin, and, if brooders are used, to keep them so 

 until nearly grown. 



Parts of an Incubator. — The modern incubator consists 

 essentially of (1) an insulated and ventilated box called the 

 ' body, (2) a heater, and (3) a regulating device. 



The body of the machine supports the heating and regu- 

 lating devices, inclosing part of each, and is in turn usually 

 supported by four legs of convenient length. 



Fig. 92 



.Ujiper or diffu- 

 sive diaphratf/n 



Narsen/ . _ _ 



__. If emulator arm 



-Meater 



■Hanffiny 



thermometer 



--Sffff tray 



■Xamp 



- J)oor 



: I" fm/ traus nmovecf, 

 ^ also called lower diaphragms 



Parts of an incubator. (Courtesy of Cyphers Incubator Company.) 



The interior of the machine is divided into three chambers. 

 The upper or heating chamber is usually separated from the 

 egg chamber by a diaphragm in the case of incubators heated 

 by diffusion (Fig. 92) or by a radiating surface (Fig. 94) 

 in those heated by radiation. In the case of hot-water 

 machines having a pipe system the chamber is occupied by 

 the pipes and is not separated from the egg chamber (Fig. 

 95). 



