YENTILATION OF STABLE. 19 



are very objectionable. The supply of air within the stable 

 should be regularly and equally distributed. A very excellent 

 plan to effect this is pursued by Mr. "Watson, of Halifax. 

 This gentleman, by his process, has ventilated numbers of 

 stables, many of which I know where the mode in question 

 answers admirably. The plan he adopts is at once simple and 

 complete. It mainly consists of a large tube, which is equally 

 divided within, from top to bottom. This tube descends from 

 above the roof, down through the floor or ceiling of the stable ; 

 at the bottom of the tube, two trap doors are secured by hinges 

 to the central division. The doors are constructed to move by 

 the aid of cords and pulleys, and being opened either wholly or 

 in part, a double current of air is established ; or in other words, 

 the bad air is made to ascend and depart, at the same moment 

 the pure air descends, and diffuses itself through the stable. Thus 

 a gentle, but perfect interchange of good and bad air is effected. 

 The expense attending the fixing of Mr. Watson's apparatus is 

 not excessive ; and where a permanent improvement of the kind 

 is necessary, and about to be effected, perhaps his plan will be 

 the best to adopt. It is also to be strongly recommended on 

 another account, that it does not readily work out of repair. 



If the premises are favourably situate, good ventilation 

 may be effected by the following mode, one equally simple 

 as that above recommended. Make an opening ten inches 

 square through the wall in front of the heads of the inmates. 

 Make it behind the woodwork dividing the hay racks from one 

 another, or immediately behind where the divisions of the 

 stalls commence. One opening in the position named, and of 

 the size specified, will be suflicient to afford air for a single 

 horse. To modify the current, and prevent the entrance of 

 foreign bodies from without, place an iron grate against the 

 outside of the opening. Where it is impracticable to cut 



