374 Some Racial Pecuharities of the Negro Brain 
brains in various positions are presented; composites are constructed 
based upon actual measurements; a table of actual measurements is com- 
piled from which an index of the association centers is worked out; and 
charts and tables are produced to determine the averages, the means, the 
CuHaAart IV. Left Hemisphere.—See legends of Charts III and I. 
extremes, and the extremes of the combined means, of the association 
centers. 
Not only is the anterior association center smaller in the Negro than 
in the Caucasian, but the whole frontal lobe of the Negro is smaller, as 
