weight for other animals. The l /z pitch, gable roof alone has 562 cubic 

 feet air space, or 2.81 cubic feet air space to each pound live weight. 



The lower the roof of the house, the less square feet wall surface will 

 be exposed on the sides and ends and hence the warmer the house will 

 be, other conditions being equal. 



A house 100 feet long and 15 feet wide, having sides 5 feet high, 

 would have 460 square feet less wall surface exposed than one similar 

 in type having sides 7 feet high. 



The working unit in building a hen house is the floor space and air 

 space required for each fowl. A safe working rule is about 4 to 5 square 

 feet floor space, and 8 to 10 cubic feet air space for every fowl. The 

 lighter breeds, because they are more active and restless, require nearly 

 as much room as larger breeds. 



The shape of the house 



Square houses economize lumber. The nearer square a house is, other 

 things being equal, the less number it will require (Fig. 36). It is 72 



PIG. 36. Square houses are mare economical 



