550 Rkadixg-Coukse for Farmers. 



already explained. When the wind blows too violently, the windows on the 

 windward side may be closed, and those on the leeward side left open. 



There is always a suction on the leeward side of the building, tending 

 to draw the air out of the room. 



The attentive reader will have observed that there are objections to all 

 plans of ventilation under certain conditions. Therefore, it is a matter 

 of prudence to have different means of ventilation at hand. It is very 

 easy to become visionary on this matter of ventilation. Thus far, faulty 

 construction of buildings has saved both man and beast from much injury 

 due to advocacy of theories of ventilation. 



IJ\ To sec It re light 



Sunlight is recognized to be one of the best as well as the cheapest 

 agents for the destruction of most forms of bacterial life. It may be well 

 to caution the reader that intense sunlight may be injurious to higher 

 forms of life as well as to lower forms, and that there may be times when 

 an animal is best protected from the direct rays of the sun, entirely aside 

 from heat produced. Four square feet of glass for each cow or horse has 

 been suggested as a practical guide in stable construction. Within rea- 

 sonable limits, the greater the horizontal extent of glass and the less the 

 vertical extent the better. In horse and cow stables the window sill may hz 

 six feet from the floor. The exact location, however, will depend on the 

 interior arrangement. The object should be to have the sunlight reach 

 the largest possible part of the room at some period of the day, and 

 especially those parts where animals stand. It is well for anyone plan- 

 ning a barn to determine by experiment the area that will be covered by 

 sunlight passing through a given opening in a given position. 



The larger the amount of glass in a building the warmer it will be on^ 

 daA's when the sun shines, but the colder it will l)e at night on account of 

 the greater radiation of heat from the glass than from the remainder of 

 the wall. In a recently constructed stable in this State provision has been 

 made for double windov,-s. In cold climates this is a great protection 

 from cold, for reasons already explained. 



V. To secure cleanliness 



There can probably be no argument as to the desirability of clean- 

 liness in barns of all sorts, and particularly when a j^roduct as delicate as 

 milk is produced and which enters more or less directly into human con- 



