106 Report oF DEPARTMENT OF ANIMAL HUSBANDRY OF THE 
THE “KING “SYS TE Mite OlasT Abies 
VENTA TONS 
W. H. JORDAN. 
This system was devised by Prof. F. H. King, formerly of the 
Wisconsin Agricultural Experiment Station, and has come into 
quite general use in recently constructed dairy barns and horse 
stables and in remodeled older buildings. It is in successful opera-. 
tion in both dairy barn and horse barn at this Station. 
The system provides for the removal of foul air from near the 
floor (openings A, A, Fig. 1), under ordinary conditions or from 
near the ceiling (openings B, B) when the circulation of air is 
sluggish or when it is desired to remove warm air quickly. These 
air exits are closed by register valves, and open into a dict, partly 
in the side wall of the stable, which is made practically airtight. It 
is also insulated by double walls and air chamber and, though near 
the roof for part of its course, is separated from it a considerable 
distance. By these means too rapid cooling of the rising warm air 
is avoided, which would cause condensation of moisture, and damp- 
ness. The two ducts from the side unite (at D) in a single duct 
which leads to a point well above the roof where it discharges 
through a ventilator that cuts off down drafts from outside air 
currents but allows rapid removal of the outflowing air. 
The system also provides for the entrance of fresh air. This is 
taken in at the bottom of a duct in the wall (F, Fig. 1), and dis- 
charged into the room near the ceiling. As shown by the floor 
plan and side elevation there are two outflow ducts on each side of 
the stable and three inflow ducts. This secures good distribution of 
the fresh air. 
In the Station stable, 33x 51 feet and accommodating 22 to 26 
cows, the 4 outflow tubes are each 10 x 16 inches, giving 640 square 
inches, or 29 to 24 square inches to each animal; and the 6 inflow 
ducts are each 6 x 16 inches, giving 576 square inches, or 26 to 21’ 
square inches to each cow. Prof. King suggests a 2 ft. by 2 ft. 
ventilating flue for each 20 cows, giving about 29 square inches for 
each cow. 
_ If the system is to be installed provision should be made to have 
it do all the ventilating; that is, walls, windows, doors and ceiling 
must be made tight. 
* A reprint of Circular No. 7, n. ser. , 
