SHELL 



-VENTILATOR SHAFT 



^ 



INSULATION 



THERMOSTAT/\ ^HEATING 



UNIT 



r 



BROODER NO. 2. SQUARE TYPE 



-VENTILATOR SHAFT 



SHELL 



"~\. 



O 



INSULATION 



HEATING UNITS 



THERMOSTAT^ ^.CURTAINS 



BROODER NO. I. ROUND TYPE 



)000 



-VENTILATOR SHAFT 



A A,^"^^'^" A A yy A A. A i 

 BROODER NO. 3. ROUND TYPE 



LE09 



Fig. 1. Diagrams of the construction and essential parts of the three 



types of brooders. 



