1T1 



succeeded with it. It is most remarkable in this, that the foul air 

 is drawn from the floor and the fresh air enters at the ceiling. In 

 the previously discussed systems as will be remembered, the foiul air 

 in every case was drawn from the ceiling, while the fresh air came 

 in at different points from the floor to the ceiling according to the 

 system being considered. 



1 



'IT 



\ 



Plan D King System. 



The advocates of the King System claim that since carbonic 

 acid gas is the chief impurity in stables, and since this gas is 

 heavier than pure air, it is likely to be found in largest quantities 

 near the floor, and therefore outlets for impure air should begin 

 near the floor level. 



