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 to run through. Other holes for this purpose should be bored in the projecting back at the bottom. Again see figure on page 116. Add a perch of doweling a half inch below the entrance.

THE FINISHED MARTIN HOUSE

RAISING THE MARTIN HOUSE

The holes in the backs should be about an inch apart on the surface and should be bored at an angle, so as to lead the wire snugly around the trunk. When the houses are put up for use, the front of each is securely closed by means of a screw eye on the side, which can be easily removed for the purpose of cleaning. Bluebird and wren houses should be in shade or part shade, about ten feet above ground, and mounted so that the upper part tilts slightly forward.

Base    Box for    Rooms    Entrances   Pole   2 Posts                  lower story

Martin 30"×30"    7"×20"×20"   6"×6"×7"   2-1/2" dia.  4"×6"×16'  4"×6"×11' house                                      1" above floor

In the center of the base a hole 4" × 6" is cut to fit the pole upon which the house is to be mounted. Two cleats are nailed underneath the base, crosswise of the boards and plumb with either side of the 4" × 6" hole. The box for the lower story is partitioned into nine compartments, each 6" square and 7" high. This gives eight outside rooms and a central space through which the pole may go. In order to provide ventilation near the ceiling,