Ventilation of Farm Buildings. 



359 



will be secured by making one or a few large ones than 

 where many small ones are provided, and it is usually best 



FIG. 154. Second best method of ventilating an ordinary barn. The air 

 comes in as described in the other figures, and passes out through 

 one or more ventilators rising against the side of the barn and pass- 

 ing out through the roof, as represented at A C E. To make these 

 flues if the barn is a balloon frame, the best method would be to 

 secure the lightest galvanized Iron in eight or ten foot lengths, and 

 place the studding where the flues are to be, the right distance apart, 

 so that a width of the metal covers the space between two studs. 

 Sheets of this metal nailed on opposite faces of the stud would make 

 an air-tight flue. On the outside, this metal would be covered with 

 the siding. On the inside in the stable, with the sheeting, but In 

 the barn above nothing would be needed except perhaps an occasional 

 shield to prevent the hay from crushing it in. If it is not desired 

 to* carry the flues through the roof, they may end just below the 

 plate, and the air pass out through the cupola. The method repre- 

 sented, however, would give the strongest draft. The width of stud- 

 ding used for the flue would vary with the number of animals to 

 be provided for. 



to have as few as practicable and not leave the air impure 

 in distant parts of the stable. 



445. Location of Ventilator. The best location for the 

 ventilating shaft is near the center of the stable whero 



