3i6 



Fig. 47.— Obnamental Geating. 



Inlets of the same kind should be placed at a 

 similar distance apart in the walls in front of the horses, 

 immediately under the eaves ; whilst the hinged sash- 

 lights in the south 

 wall should hang 

 from their centres, 

 and be opened or 

 closed as circum- 

 stances require. 

 The entrance of 

 fresh air at the 

 iron gratings near 

 the ground expels 

 the foul air from the floor of the stable, whilst those 

 higher in the walls augment the current and force it 

 upward towards the roof. 



OUTLETS. 



In order to liberate the vitiated air outlets must be 

 inserted in the roof, and it is necessary that their col- 

 lective air space should exceed that of the inlets. 

 Perforated ridge tiles can be had for this purpose, but 

 they are neat rather than effective owing to the small- 

 ness of their apertures. In addition to a ridge of this 

 kind, outlets should be let in on both sides of the roof, 

 two feet below the ridge, at intervals of three feet 

 apart. Those on the south side should be placed 

 intermediate to those on the north, and in this way 

 the escape of the vitiated air will be accelerated. 



The ventilators should be composed of zinc, semi- 



