54 



thirteen inches deep inside measurements. A division board 

 with a circular opening seven and one-half inches in diameter is 

 placed across the box twelve inches from the back end and fifteen 

 inches from the front end. The back section is the nest proper. 

 Instead of a close door at the entrance, a light frame of inch by 

 inch and half stuff is covered with wire netting of one inch mesh. 

 The door is ten and one-half inches wide and ten inches high and 

 does not fill the entire entrance, a space of two and a half inches 

 being left at the bottom and one and a half inches at the top, with 

 a good margin at each side to avoid friction. If it filled the entire 

 space it would be clumsy in its action. It is hinged at the top and 

 opens up into the box. The hinges are placed on the front of the 

 door rather than, at the center or back, the better to secure com- 

 plete closing action. 



"The trip consists of one piece of stiff wire about three-six- 

 teenths of an inch in diameter and eighteen and one-half inches 



long, bent as shown in drawing. A 

 piece of board six inches wide and just 

 long enough to reach across the box 



inside is nailed flatwise in front of the 

 partition and one inch below the top of 

 the box, a space of one-fourth of an inch 

 being left between the edge of the board 

 and the partition. The purpose of this 

 board is only to support the trip wire in 

 place. The six-inch section of the trip 

 % [fj ^ wire is placed across the board and 



1 jj* V "*** the long part of the wire slipped 



\) through the quarter inch slot, and 



passed down close, to and in front of the 

 center of the seven and a half inch cir- 

 cular opening. Small wire staples are 

 driven nearly down over the six-inch 

 section of the trip wire into the board 

 so as to hold it in place and yet let it roll sidewise easily. 



"When the door is set, the half inch section of the wire 

 marked A comes under a hard wood peg or a tack with a large 

 round head, which is driven into the lower edge of the door 

 frame. The' hen passes in through the circular opening and in 

 doing so presses the wire to one side, and the trip slips from its 

 connection with the door. The door promptly swings down and 



