SECTION PLAN 4 
| "A-B-D,A-B-D Air Ducts, Latevals 
Main Air Duct. 
Lower Aiy Exits 
cow STABLE 





Upper " " 
F-O, Fresh Arr Ducts 
Fo Intake 
G Discharge 
t t 



— | 
4 
. 
| 
\i 
\\ 
Say 
> 
~— SVs 
Fic. 1.— Section oF CaTrLe BARN AT NEw YorK AGRICULTURAL EXPERIMENT 
STATION, GENEVA, N. Y., SHOWING SYSTEM OF VENTILATION. 
