STABLES 



255 



The cubic air space of the stable should be ample to insure 

 to each horse the requisite 15,000 cubic feet per hour without 

 such frequent changes of the volume of air as to cause drafts or 

 a continuous fluctuation of temperature. Sixteen hundred cubic 

 feet per head, requiring a complete change in the volume of air 

 nine and one-half times per hour in order to furnish 15,000 

 cubic feet per head per hour, is the ideal aimed at in the design- 

 ing of the English Army stable. Changing the air so frequently 

 keeps the stable decidedly fresh and renders a horse more fit for 

 sei-vice than for show. About one cubic foot per pound of 

 weight is the usual rule in figuring the air space of the stable. 

 It should be remembered, however, that the nearer the tempera- 

 ture and the atmosphere of the stable approaches that outside, 

 the more capable the horse is of hard and fast work. 



The size of the inlet or window necessary to admit the re- 

 quired amount of air is computed from the following table : 



Rule for Computing. — Multiply the number of animals to be 

 supplied with air by tlie size of the inlet corresponding to the 

 estimated velocity of the wind. This divided by the number of 

 ventilators on the inlet side of the building gives the size in 

 square feet which each ventilatx)r or window should be opened. 

 Outlets should have the same opening in order to facilitate the 

 movement of the air. 



Fresh Air for Horses. — On account of the fact that most 

 horses work regularly in the open air, the principles of ventila- 

 tion are violated with greater impunity in their case than in the 



