152 Milk and Its Products 



em methods of waterproofing the stable floors have 

 overcome quite largely the objections that were for- 

 merly made to cement because it was damp, and con- 

 sequently a great conductor of heat. 



It is important that the stables be constructed with 

 particular reference to ventilation. It is essential that 

 the air in the stable shall be comparatively fresh at 

 all times. While there is no accepted standard or 

 easy means of determining the purity of the air in 

 the stable, yet it may be said that it will be sufficiently 

 pure when, on entering the stable from out-of-doors, 

 the air presents a fair degree of freshness, with no 

 marked animal odors or perceptible -stateness. If such 

 odor or staleness is obvious, the stable should be 

 considered not sufficiently well ventilated. 



As dust is a great carrier of bacteria, it is impor- 

 tant to admit only pure air and to have all dairy-rooms 

 and stables as free from dust as possible. When con- 

 ditions will permit, it will be found an advantage to 

 have as much as possible of the grounds surrounding 

 the stable covered with turf. This will prevent, to a 

 considerable degree, the entrance of dust in the sta- 

 ble, particularly during the dry summer months when 

 it is most difficult to produce milk having a low 

 bacterial content. 



Sanitary stables. It is important that sunlight be 

 permitted to enter the stables. This feature is con- 

 sidered of so much importance by some milk producers 

 that they endeavor to arrange their stables so that 

 the sunlight may be permitted to enter on one side of 

 the stable in the forenoon and on the other side in 



