VENTILATION 



69 



This valved window is placed above the horse's head, 

 and is a useful addition to the lighting of the stable ; if the 

 latter be defective in light Fig. 5 may be employed. For 

 industrial stables the ventilating iron framed window 

 employed in Army stables may be used ; this is 3 feet 

 3 inches high, 2 feet 6f inches wide, and the upper part, 

 when swung inwards, is fully open at ISJ inches, thus 

 affording a ventilating area of a little over four square 

 feet. 



Fi.a 



.— Sheriushani ventilating window (Musgvave). 



All this class of window can be regulated to any size, and 

 as a ventilating medium cannot be surpassed. 



The direction taken hij air currents under the system of 

 natural ventilation has been made a subject of special 

 study, and as the matter is of the utmost importance to a 

 clear understanding of the system of ventilation by wmdows, 

 no excuse will be made for dealing with it somewhat m 



detail. .,, 



The type of stable now being described is the one witn 

 two horses only between opposite sources of air, with a 



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