EXPERIMENTS IN VENTILATION OF DAIRY BARNS. 



Many systems of ventilation for cattle barns have been devised 

 and advocated by many experimenters. The writer has tried between 

 25 and 30 different systems within the last ten years. Most methods 

 tried have proven more or less objectionable. Of all the systems 

 advocated, that commonly known as ' The Rutherford System of 

 Stable Ventilation ' would appear to be the one most worthy of trial. 

 A system known as the King System has been widely advocated. It 

 proved quite unsatisfactory here. It would seem to be better suited 

 for warmer countries. Below are submitted descriptive cuts and 

 brief explanatory notes of a number of systems or methods. 



SYSTEM OF VENTILATION ' A/ PIERCED WALLS. 



[Plan A Pierced Walls.} 



This system of ventilation is simple and cheap of installation. 

 All that is required is the piercing of square or round holes on all 

 sides exposed to air. These holes or openings in our standard stable 

 (30 x 36) should be 4 inches in diameter at three feet intervals, or 

 6 inches in diameter at six feet intervals in at least three sides of 

 the building. They had better be provided with some sort of door 

 or key to control either incoming or outgoing currents of air. The 

 fresh air will, if permitted, enter from the side against which the 



