3i8 



admission of fresh air and the expulsion of vitiated air 

 must always be in excess of the respiratory require- 

 ments of the animals. 



BUILDING MATERIALS. 



Brick is probably the most economical material for 

 building" purposes, but sand, or whin-stone, is more 

 substantial, and looks better. This, however, is largely 

 influenced by local supplies and individual taste. 



ROOFING. 



Slates are preferable to all other kinds of roofing. 

 They withstand the wind well in exposed places, and 

 are much lighter and neater than tiles, which are very 

 antiquated and are fast becoming a thing of the past. 



Corrugated iron, although cheap, is not a good 

 system of roofing for stables, as it is excessively hot in 

 summer and proportionally cold in winter, and the 

 noise occasioned by rain and hail falling upon its sur- 

 face is very disagreeable to the animals beneath it. 



SPOUTING. 



Metal, or creosoted wood spouting may be used. 

 From an economical point of view, the one is as suit- 

 able as the other, but the former requires to be painted 

 at least every alternate year to keep it in thorough 

 repair. It is neater than creosoted spouting, but it is 

 not more durable. 



Down-comers should be carried down the walls in 

 order to convey the water to the roof drains, unless it 



