46 POULTRI-CRAFT. 
45. Incubator Cellars.— A dry well ventilated cellar or basement is the 
best place for an incubator. Machines can be run successfully in rooms 
wholly above ground, but require closer attention because of greater and more 
rapid variations in the temperature of the room. Where only one or two 
machines are used they are oftenest kept in the cellar of the dwelling. In 
case of fire this may invalidate insurance. It is better always to have a place 
specially for incubators. On a large plant the incubator cellar is a necessity. 
Various methods of constructing incubator cellars are shown in Figs. 24, 28, 
34. An incubator cellar need not be well lighted, but provision must be 
made for thorough ventilation. The air must be kept pure. Usually this is 
accomplished if the cellar has arrangements for ventilation about as in a good 
dwelling house cellar. 
Fig. 29, Exterior View of a Long Brooder House. (By courtesy of E.M. & W, Ferguson). 
46. Brooder Houses.— The style of brooder house used will depend on 
the system of brooding adopted. If the continuous pipe system is used, the 
brooder house will, in its general features, resemble the long poultry house 
with passage dnd single row of pens. Fig. 29 is an exterior view of sucha 
—_ > ft 
3 
Fig. 30. Ground Plan of a Long Brooder House — Pipe System — single row of pens, 
