﻿BLUE-FOX FAEMIKG IN ALASKA 



13 



construction and operation of the trap itself is given in Figure 17- 

 Foxes arrive at the entrance to the chute (1) by means of a sloped 

 board (2). The trap floor pieces 3 and 3' are pivoted at 4 and 4% 

 respectively. To make them reset automatically, counterweights (5 



Fig. 13. — An excellent type of trap-feed house, trap for which is detailed in Figures 



15 to 17 



and 5') are placed on the lower side at opposite ends of the floor 

 pieces. Floor piece 3 is securely locked and supported by the square 

 notch (6) portion of the trigger (7). Floor piece 3' rests lightly on 

 the beveled (8) portion of the trigger (7) so that the weight oi the 



Fio. 14. — ^Trap houKC* in which the foxes eat on the second Jloor and wh(;n the trap 

 is sprunj? fall to the floor below 



fox's front feet on the ends of tlie floor piece 3' depresses the board 

 and forces outward the entire trigger, thus releasing the floor piece 

 (3) from the support ((')) portion of the trigger. Floor piece 3, 

 with the weight oi the hind part of the fox, and floor piece 3', with 



