THE LOCATION OF THE FLUE 185 



tin or galvanized iron, be covered over with boards. This insula- 

 tion is to prevent the cold air of the hay loft from so cooling the 

 out-going air as to check it, and turn it downward. The air 

 inlets should be smaller and of greater number than the outlets. 

 They consist of shorter shafts through which the air must rise 

 before entering the barn. 



Sje 



Fig. 64. — Elevation Woodland Dairy Farm barn. Note system of ventilation. a, 

 outlet in summer; b, outlet in winter; and d, inlet at all times. Also the dirt-tight floor 

 over the stock. Straw for bedding as well as hay for feed is stored in the loft. 



The location of the flue would best be near the center of 

 the stable. This permits a straight duct and encourages draught 

 but may be against the walls and roof. In summer the warm 

 air at the top of the stable may be drawn away, while in winter 

 the suction may commence at the floor as shown in figure 64. 

 The air inlets should be made in the walls so as to admit the fresh 



