ECONOMY OF THE ROUND DAIRY BARN 23 



shown in Fig. 18. The south door in the cow stable can be closed 

 by slatted gates, thus affording an abundance of fresh air and sun- 

 shine on nice days, without letting the cows out of the barn. 



SYSTEM OF VENTILATION v 



The system of ventilation is the "King." To economize space 

 and lumber, the hay chute is used for a ventilator. This chute, 

 which extends to the cupola, is 2^x3^ feet, having a cross sec- 

 tion area of 8 sq. ft., which, with a good draft, is sufficient for 

 40 cows. In order that this combination of ventilator and hay 



FIG. 21. CONTINUED. 



chute prove practical, doors thru which the hay could be thrust 

 were placed at intervals in the side of the chute. These doors are 

 hinged at the top, opening in, and close immediately after the hay 

 drops, thus maintaining a closed ventilator chute. The air is drawn 

 in at the bottom, the amount being regulated by means of a sliding 

 door in the side. As this chute is 50 feet high, it creates a strong 

 suction. 



