VENTILATION, 6 1 



opposite each other, so that a through ventilation may be sus- 

 tained, and the sashes closed or opened, as the direction of the 

 wind may dictate, or the temperature of the stable necessitate. 

 A stable having this advantage should have the double aspect 

 of north-west and south-east, or nearer to the north and south 

 than to the east and west ; the entrance being towards the 

 south, and the heads of the horses to the N.N.W., as the light 

 admitted from a northern direction is more uniform in cha- 

 acter than any other, and better for the sight. 



The temperature of a stable should vary with the kind of Temperature, 

 work in which a horse is engaged ; the maximum should not 

 be over 65^ at any time, nor should it be allowed to fall below 

 45°. For most horses an average between 50° and 60° is the 

 best and most easily maintained. As a rule, the greatest 

 difficulty will be found in keeping it sufficiently cool. To a 

 great extent the automatic action of the ventilators hereafter 

 described can be depended on ; for the rest, the aspect of the 

 stable in relation to the prevailing wind and the infallibility of 

 natural laws must be considered in the use of what may be 

 called the provisional appliances. 



In a well-ventilated stable an even temperature may be 

 maintained by a daily observation of the prevailing wind, 

 attention to the increased or lessened pressure of the atmos- 

 phere as the horses are admitted or discharged from the building, 

 and by opening or closing the windows as the case may 

 require. It need scarcely be added that a barometer will 

 greatly facilitate the necessary observations. 



The conditions in a stable vary much^more than in a house. Cubic contents 

 though the same argument holds good with regard to the former, of stables. 

 viz. that it is not sufficient to consider the cubic contents if the 

 necessity of the constant, and at intervals, the complete change 

 of air, is lost sight of. It is impossible, as the best authorities 

 admit, to establish any comparison as to the cubic contents 

 required for a horse, with that which is necessary for a human 

 being \ the latter is more susceptible to change of temperature, 



