FARMERS 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 floor by unfastening two 

 boards f inch. wire hooks. 



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. 



6-* 



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 f inch. 



