10 



farmers' BULLETIN 795. 



opening is made m the upper side for inspection, cleaning, and 

 ventilating. Above the barrel a screen door is hinged to preclude 



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; :> c ■ ;7T^ • v^^'ro:^^;^ 



WL 



Fig. 5. — Vertical longitudinal section of barrel den. 



escape when the cover is raised. A sheet of burlap tacked to one 

 side of the screen-door frame and spread over the netting when 



the covers are raised for ventila- 

 tion will keep out air currents and 

 light. At the entrance hole is an 

 elbow spout, 2| feet in the shorter 

 arm and 6 feet in the longer. 



The large den shown in figures 

 7 to 9 has advantages not found in 

 barrel dens. It has double walls, 

 the interspaces being lined with 

 building paper and filled with saw- 

 dust. The exterior 

 may be battened, 

 shingled, or covered 

 with tarred paper. 

 It is large enough to 

 give the foxes loung- 



Fio. fl. — Exterior view of a barrel den (see figs. 3-5). 



ing room outside the nest compartment, and is arranged so as to 



