Bob white 



35 



this staggering is that any large tract always contains more "blanks" (or unused 

 places) than a small tract, hence 1 acre per quail in a 640-acre sample actually 

 indicates a denser average population in the surrounding township or county than 

 0.5 acres per quail in a 160-acre sample. It is desired that a glance at the map 



QUAIL POPULATION 



AS DETERMINED BY A 



GAME SURVEY 



OF THE NORTH<ENTRAL STATES. 



MADE BY ALDO LEOPOLD IN 1928-1929 FOR THE 



SPORTING ARMS 4 AMMUNITION MANUFACTURERS'INSTITUTE 



MAP 6 



give the reader a true impression of how abundance varies as between counties and 

 States, without being obliged to make a mental allowance for which samples are 

 large and which small. 



Map 6 is best for Missouri, because this State was surveyed after the method 

 had been satisfactorily developed. The samples for the other States are not numer- 



