WOOD-ANDIRON BUILDINGS 85 



openly constructed type, for the sake of coolness, and to allow free 

 circulation of air throughout the exercise yard. Thus, the fences 

 in question might be of the open spar type; or pig-netting, or some 

 form of woven or meshwork fencing might be used. Either of the 

 two last-mentioned materials should be protected from the pigs rubbing 

 themselves against it, by a spar nailed in a horizontal position to the 

 fencing posts and situated near to the foot of the fence. 



The, corrugated iron forming the walls of the pens should not be 

 carried quite up to the roof, so as to allow for ventilation. 



In warmer districts, for the sake of coolness, the walls between 

 individual pens, and also those between pens and exercise yards, should 

 be of the dwarf type. Thus, in one instance known to the author, the 

 corrugated iron of these walls extends to a vertical height of only 

 30 inches above the floors of the pens, but the height is raised another 

 9 inches by four barbed wires stretched horizontally above the corru- 

 gated iron at vertical intervals of 2\ inches. Of course the end walls 

 (of the whole building) are carried up almost to the roof. 



No doors need be provided in the doorways between the pens and 

 the exercise yards. 



The pens may be provided with flagstone floors. The level of 

 the floor in any pen should be a little higher than the level of the 

 surface of the exercise yard attached to that pen, a step at least 2 

 inches high being formed at the doorway between pen and yard. The 

 floor of each pen should be sloped so as to drain towards the doorway. 



Since, in a building of this class, the roof would probably not be 

 provided with rain-water guttering, it is advisable to flag at least a 

 strip of the exercise yards, about 3 feet in width, immediately below 

 the eaves, to receive the rain-water falling from the roof. Rain-water 

 from the roof, if allowed to fall on the bare earth soon erodes a hollow 

 therein. 



Wooden sleeping platforms, about 6 feet by 5 feet in size, should 

 be provided within the pens. They should be capable of being removed 

 from the pens for cleaning purposes, and may consist of open sparwork. 



The dimensions of the timbers shown in the drawing are as 

 follows : — 



Posts, 4£" by 3"; rails, 4£" by 1£"; fence rails, 3" by 2"; roof 

 plates, 3" by 3"; rafters, 4£" by H" ; purlins, 3" by 2"; hardwood 

 feet for posts, 5" by 5". 



