298 THE HOUSE FLY—DISEASE CARRIER 
inches wide, and 8 feet 5 inches long; these are nailed 
next to the sides. (Fig. 38.) 
Roof .—The roof may now be finished. This re¬ 
quires five boards (/), measuring (when cut to fit) 
1 inch thick, 12 inches wide, and 6 feet long. They 
are so placed that they extend 8 inches beyond the front. 
The joints (cracks) are to be broken (covered) by 
laths one-half inch thick, 3 inches broad, and 6 feet 
long. (Fig. 39.) 
Box .—The front of the box may be made with 
two boards, 1 inch thick, 3 feet 10 inches long. One 
may measure 12 inches wide, the other 5 inches wide. 
These are nailed in place, so that the back of the 
boards is 18 inches from the inside of the back- 
boards. The seat of the box may be made with two 
boards, 1 inch thick, 3 feet 10 inches long; one 
may measure 12 inches wide, the other 7 inches 
wide. One must be jogged (cut out) to fit around the 
back corner posts (F). An oblong hole, 10 inches 
long and 7^2 inches wide, is cut in the seat. The edge 
should be smoothly rounded or beveled. An extra 
(removable) seat for children may be made by cutting 
a board 1 inch thick, 15 inches wide, and 20 inches 
long; in this seat a hole is cut, measuring 7 inches long 
by 6 inches wide; the front margin of this hole should 
be about 3 inches from the front edge of the board; 
to prevent warping, a cross cleat is nailed on top near 
or at each end of the board. 
A cover (K) to the seat should measure 1 inch thick 
by 15 inches wide by 20 inches long; it is cleated on 
