HATCHING AND REARING 



21 



adverse conditions, there are certain circumstances which 

 the best machines cannot overcome, and which uninformed 

 operators occasionally throw around them. Some years 

 ago, a cellar was considered by far the best place in which 

 to operate a machine, the main idea being to secure a place 

 having a fairly even temperature. Since, it has been dis- 

 covered that, although uniformity of temperature is desir- 

 able, ventilation and some sunlight are fully as important. 



Corner in a Substantial, Well Lighted Incubator House Which is Below 

 Ground to the Sills of the Windows. 



The oxygen of pure air is very essential to success in this 

 work and good hatches of strong chicks cannot be obtained 

 when the machine is surrounded by foul air. The most 

 satisfactory incubator rooms are partially below ground 

 but have two or more feet of each side, or at least the south 

 side, above ground, with sufficient window space to admit 

 plenty of light. Effective ventilation is more difficult 

 to provide in such a building than the one which is wholly 

 above ground, but if air is admitted near the ceiling through 



