334 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 193 2 



Briefly stated, the solution of this part of the problem may be 

 found in the following postulate : Given a fairly accurate statement 

 of the number of wild ducks killed in North America in any one sea- 

 son, the total number of ducks present on the continent for that 



FiGUUB 2. — The dispersal of bauded ducks from the Clieyeoue Bottoms, Kaus. 



season may be estimated by a percentage computation based upon 

 the ratio that the total number of banded ducks killed during their 

 first season as band carriers, has to the total number banded. (Cf. 

 Lincoln, 1930.) 



