FARM SANITATION 



701 



ceiling and conducting the foul air from the interior through an opening 

 sometimes located at the highest point of the building. 



Dampers should be placed at the intake and the outlet in order that 

 this system may be thoroughly controlled. For horses and cows the 

 area of cross section of outlet flues should not be less than 30 square inches 

 for each animal when the flue is 30 feet high, and 36 square inches for each 

 when only 20 feet high. The cross section of the intakes should aggregate 



A Pneumatic Water Tank. 1 



approximately the same as the outlets. Ventilating flues should be airtight 

 and with as few bends as possible. 



There is a system of using double sash windows for dairy barns, in 

 which the top sash is hinged at the bottom so as to permit the entrance of 

 air when the top of the sash is drawn into the barn a few inches. The air 

 entering is deflected upward, thus avoiding a draft of cold air upon the 

 cattle in the barn. This is one of the absolute essentials of a good ventilat- 

 ing system. Deflectors should be placed at the sides of the windows, which 

 will also prevent air from blowing directly upon the stock. 



Water Supply. — Water can be supplied to a home under pressure from 

 an elevated tank, also from a pneumatic tank into which water is pumped 



1 Courtesy of Fairbanks, Morse & Company, Chicago. 



