8 FAEMERS^ BULLETIN 609. 
Fig. 16.—Lumber diagrams for building house Fig. 17.—Diagrammatic drawings of bluebird house. This 
shown in figures 12 to 15. Thickness of house can be removed from its fioor by unfastening two 
boards f inch. wire hooks. 
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<0 
i. 
e-£ 
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Fig. 18.—Lumber diagrams of house 
shown in figure 17. Thickness of 
boards f inch. 
Fig. 19.—Style of house suitable for 
sparrow hawks, screech owls, blue¬ 
birds, and wrens. Designed to be 
placed in trees. Bottom can be 
removed by turning button. 
Fig. 20.—Section of 
house shown in 
figure 19. 
Fig. 21.—Diagrams of house shown in figure 19 for sparrow hawks 
and screech owls. Thickness of boards i inch. 
