-20- 
Half-wheel (9 chickens)   M   ,e-" 1',ci        @t" S.sL1 0   
 AJ1t 
The Hamerstroms' original model, used only at the end 
of the 1936-37 season, was like the portable funnel 
except that (i) the ends of the trap were made of the 
halves of an old buggy wheel from which the spokes had 
been removed, and (2) it had a take-out door at the end 
opposite the A single funnel (fig. 6 in the Manual). 
Dimensions: 4' long, 43" wide, 19" high. ((&,p      i  rLr4*1Ar4U)

1938-39 -- Because chickens caught in the standard 
portable funnel were injuring themselves against the 
wire funnels, the funnel was taken out of this trap. 
Two substitutes were tried: bob-wires completely across 
each end (3 chickens); in each end a seine funnel ending 
in one pair of bob-wires (6 chickens). 
we 119, 
Bob-wire (516 sharptails, la chickens) 
large trap having a seee.-Cbob-wire entrance 
along ,~ aide/, with a darkened chamber (b     a     Ane 
r      at one end for ease in removing birds from trap. 
There are "   --4Wee immovable wires at each end of the 
two W bob-wire sections, and a single fixed wire after 
each three pairs of bobs along the length od each section& 
these fixed wires reduce escapes. The method of hanging 
the bob-wires and the details of the slotted bottom board 
are the same as for the modified wing-funnel, already 
illustrated. In the body of the trap the top. end, and 
sides above the bob-wire sections are covered with seine; 
the catching compartment is covered with burlap. Fiue 
Dimensions: 30"xlO'x 21" high; catching compartment about 
3011 long, with a 12"x14" take-out door in the topl (fig. 
7 in the Manual). See ground plan below: