114 PRACTICAL DAIRY BACTERIOLOGY 



once from the milk-producing herd until complete recovery has 

 taken place. It is well also to remember that exercise is needed 

 by the cow, both for its own health as well as for that of human 

 beings, and that the best of results can never be obtained unless 

 the cows are given a certain amount of outdoor exercise. 



The Stables. The location of the cow stables should be such 

 as to give the freest possible circulation of air. (Fig. 41.) It is 

 much better to have them on high ground in which there is 

 ready drainage than on low ground. Both air and light in the 



FIG. 41 MODEL DAIRY BARN 



stables are necessary for the best results. Each cow should 

 have three to four square feet of window surface and 400 to 

 450 cubic feet of air space. If possible a separate place for 

 calving should be provided. While the animals are in the yard, 

 as they should be daily, the stables should be thoroughly aired. 

 (Figs. 42 and 43.) The older plan of keeping the barns tightly 

 closed for the purpose of saving warmth injures both the quality 

 of the milk and the health of the cattle. A good system of 

 ventilation is necessary. 



The cleanliness of the stable 'is a matter of utmost importance. 

 The habits of the cow and the nature of the manure are such 



