LECTURE XXIII 



YENTILATION— Continued 



Stable Construction 



Space needed. — A large space — 500 cubic feet or more per 

 animal — is important; but this does not lessen the necessity for 

 ventilation. The atmosphere in a large stable housing a given 

 number of animals may become just as foul as that in a smaller 

 stable with the same number of animals, the only difference 

 being the length of time required to reach this condition. The 

 larger space makes possible the admission of a sufficient amount 

 of air, without such drafts as would be the result if the same 

 amount of air per hour were admitted into a smaller stable. 



Location. — In order that a stable may be well lighted and 

 well ventilated, it is necessary to exercise care in selecting the 

 location and in planning the proportions of the building. One 

 of the most desirable forms is that of a main part standing east 

 and west and used in a general way for storage purposes, with 

 one or two "ells" at right angles to this on the south. Such an 

 arrangement gives a very satisfactory and well-protected yard 

 on the south, and an even lighting to the various portions of 

 the "ells" in which the animals are kept. When a stable ex- 

 tends east and west, and is wide enough for two rows of stalls, 

 the animals on the north side do not get much sunlight, and the 

 general lighting of their portion of the stable is poor. 



Width. — To be capable of the best ventilation, a stable should 

 not be over 25 to 30 feet in width ; and the lower the better 

 within reasonable limits, when one is depending on ventilation 

 by doors and windows. 



Windows. — In order to secure suitable ventilation in a build- 

 ing of this kind, two sets of windows should be provided, at least 

 one set on each side, or better still, two sets on each side, one 

 above the other. Door should be opposite door, and window 

 opposite window wherever practicable. Sweep of sunlight over 

 floor and fixtures is most desirable. 



In general where one is depending upon natural ventilation, 



114 



