BARNS FOR WISCONSIN DAIRY FARMS 



SUNLIGHT is THE BEST DISINFECTANT 



A barn should be lighted, so far as is possible, by direct 

 sunlight. Sunlight is a great disinfectant and the best sani- 

 tary conditions can be obtained only in a well lighted barn. 

 Darkness and dampness are serious objections to bank barns. 

 The only good point in favor of the bank barn is warmth. 

 Warm basements with good walls may be secured by build- 



FIG. 2. LONG UP AND DOWN WINDOWS BEST. 



The long up and down window admits direct sunlight farthest into the barn and 

 over a greater area as showed at D. Dotted lines show sunlight which would be 

 cut out by 18 in. wall. Wall should be finished as shown at C. 



ing in a sheltered spot or by having a bank not over four feet 

 high on one side. Window space should never be sacrificed 

 for a bank barn. 



The amount of lighting surface required in a barn is four 

 square feet of window glass to each animal, or one square foot of 

 glass for 20 square feet of floor space. The amount of direct 

 sunlight entering through any window will depend on the 

 length of the window, rather than on the width, the length 

 of the overhanging eves and the thickness of the wall. The 

 long dimensions of all windows for barns should be up and 

 down as shown in Figure 2. 



