16 PROFITS IN POULTRY. 
pitch, but within a ceiling is placed at the hight five and 
a half to six feet. This may be of slats, or plastering 
lath, placed the width of a lath apart, and in the winter 
the space above may be filled loosely with straw. Thus, 
with ventilating doors above, there can be no direct draft 
upon the fowls. In such a room there will always be a 
circulation of air. The air warmed by the bodily heat 
and the breadth of the fowls, rises into the upper part of 
the room. There is a constant current of cool air flowing 
down against every window, and this causes a circulation 
—up through the roosts, down by the window. After a 
while the air may become charged with carbonic acid gas 
from the breath of the fowls. This is heavier than the 
air, hence would, after being chilled by the window, not 
be likely to rise, but would in part flow off into the other 
compartment, through the passage for the fowls near the 
window. The closeness of the quarters for the number 
of fowls stated, will secure a high temperature at night,. 
provided the walls and roof are reasonably tight, without 
danger. Perhaps the best way to secure a warm roof is 
the following: lay first a roof of hemlock boards, laid 
with the slope ; upon these, shingling laths, and shingles. 
This secures an air space an inch thick under the shingles, 
in addition to the board roof. So constructed, no rafters 
would be needed, but one scantling, set edgeways and 
supported by posts in the middle of each side, and in the 
partition, to make the roof stiff. 
The roosting-room is supplied with a large dust-box, 
always well filled, and two ranges of nest boxes, with 
sloping tops, as shown in figure 2. The chickens can not 
_stand on these tops, and being set on each side of the 
room, they are made to support the roosts, which should 
not be higher than two feet, or two and a half feet from 
the floor. The best form of roost is made by taking two 
straight grained, smooth pine sticks, two inches wide and 
ene inch thick, and nailing them together T-fashion. 
