14 
BULLETIN 1350, U. S. DEPARTMENT OF AGRICULTURE 
the weight of the fore part of the animal, pivot at 4 and 4', respec- 
tively, and drop the fox to the floor of the house. 
The weight of the fox removed, the counterweights (5 and 5') 
restore the floor pieces to position, ready for the next fox. The 
opening (9) of the inner end of the chute is ordinarily left open 
Fig. 15. — Front and side views of trap and feed bouse, with trap installed 
in order that the animals may come and go at will, but it is closed 
with wire netting when the trap device is to be used. The draw- 
ings illustrate a runway board (12), similar to the board (2) pre- 
viously mentioned, which is provided to permit free passage through 
the trap into the trap-house when desired. 
^X/T^OM C//t/T£ 
Fig. 1G. — Trap and feed box that can be installed in a bouse of almost any description 
A light spring (10), pushing outward above the pivot of the 
trigger, insures the trigger returning to place. When the trap is 
not in use the trigger should be removed and a cleat nailed across 
the free ends of the trap floor boards of the chute, thus making 
the floor solid. The trigger (7) should be made of hardwood, or 
