POULTRY LABORATORY GUIDE 23 



not, place a thin piece of wood under the free 

 legs to steady it. Open the door and take out all 

 internal fixtures, including the following : dia- 

 phragm, egg trays, thermometer, and if the in- 

 cubator is equipped with nursery drawers remove 

 same with covers. Clean these parts thoroughly 

 and wash aU woodwork, including inside walls, 

 egg trays, etc., with a sponge moistened with 

 a ten per cent solution of creolin. Allow parts 

 to thoroughly dry before replacing them in the 

 machine. 



Determine whether the machine is of the hot 

 air or hot water type. In the hot water machine 

 note the presence of tubes or tanks in the top of 

 the incubator through which the water circulates. 

 If hot air, a round metal tube will be seen run- 

 ning from the top of the lamp chamber about 

 three quarters of the way across the top of the 

 incubator, through which the hot air travels. 



Remove lamp, and notice means of support. 

 Practise putting in and taking out the lamp, 

 being careful each time to have the burner fit 

 the base of the chimney perfectly. Examine the 

 lamp box and determine the course taken by the 

 pure warm air on its way to the egg chamber, 

 also that of the foul air direct from the flame. 

 What is the object of the asbestos packing about 

 the lamp box ? 



