498 FARM ANIMALS 
tom to keep both doors and windows closed for any 
length of time if several people are in a room. One 
should never sleep in a room with every window closed. 
On retiring, open the window, even if only slightly, and 
during the day open the windows wide for purposes of 
airing. An open fireplace in the living room is an excel- 
lent outlet for impure air. 
15. Outside sleeping rooms.—The outside sleeping 
room may be built at any side of the house, over a piazza, 
a projection or a one-story room. One or more sides may 
be protected by the siding of the house, as the case may 
be. Canvas or wood shades are desirable also to pro- 
tect against storms of rain and snow. An open sleeping 
room should be protected also against flies and insects 
by wire screening of small mesh. The roof may be made 
of canvas and painted frequently, or of tin, shingles or 
prepared roofing. In building a room of this kind it is 
important that outside architectural features be observed, 
and this addition be made to blend with other outside 
features of the house. And it should be absolutely tight 
on all sides except one. 
