BIRD HOUSES AND HOW TO BUILD THEM 
7 
Fig. 10.—Nest shelter. 
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Fig. 11.—Lumber diagrams for nest shelter shown 
in figure 10. Thickness of boards f inch. 
Fig. 12.— Cross section and 
interior view of front half 
of house for swallows and 
bluebirds. 
for house shown in 
figure 12. 
Fig. 14. — Floor and posts 
added to foundation 
shown in figure 13. 
Fig. 15.—House ready to place over floor 
and posts as shown in figure 14. 
