Smithsonian Report, 1 932.— Lincoln 



PLATE 1 



Photograph !■ !■■ ■' ' ' ■ i- i..i1.r-..Ti 

 A COMBINATION TRAP BAITED WITH WATER DRIPPING FROM THE PAIL INTO A 

 SHALLOW BASIN WHICH IS ALMOST CONCEALED BY THE LOWER DOOR 



The doors are released simultaneously. 



