212 Farm Poultry 



perature, but the room is likely to be ventilated 

 with difficulty unless special provisions are made. 

 During the warm days of spring and early summer 

 it is somewhat difficult to ventilate a cellar or even 

 a basement without causing drafts, which would 

 interfere with the lamps and prevent them from 

 burning steadily. During cold weather, when the 

 air in the cellar is warmer than that outside, it will 

 readily escape through ventilating flues if given 

 an opportunity to do so; but whenever the outside 

 air is warmer and consequently lighter than the 

 cool impure air of the cellar, ventilation without 

 drafts becomes a serious problem. 



Care of incubators. Incubators should receive 

 the same care and careful adjustment that are 

 given to other delicate machines. The accurate 

 working of the incubator will depend very largely 

 on the treatment it receives from the operator 

 or attendant. Whoever has charge of an incuba- 

 tor should plan to give it a careful inspection at 

 regular intervals. It should not be necessary, 

 however, to visit an incubator oftener than twice 

 a day. It is always well for the beginner to run the 

 incubator for a few days before filling it with eggs, 

 in order that it may be properly adjusted, and also 

 to give the operator a little experience before risk- 

 ing loss. 



After the machine is adjusted and the atten- 

 dant has gained some knowledge of operating it, 



