410 Some Racial Peculiarities of the Negro Brain 
average weight of twenty-two male Negro brains weighed by sundry men, 
at various times, in divers places with different systems of weights and 
under dissimilar conditions is 1256 grams; the largest, 1458 grams; the 
smallest, 1100 grams. The average weight of 10 female Negro brains 
under similar conditions is 980 grams; the largest, 1325 grams; the 
smallest, 738 grams. Waldeyer™ gives the average weight of twelve Ne- 
gro brains in the fresh state as 1148 grams; the largest, 1450 grams; the 
smallest 780 grams. Sandford B. Hunt*™” gives the average weight of 
140 male Negro brains as 1331 grams; the largest, 1585 grams; the 
smallest, 1010 grams; the average of 240 male mixed bloods, Negro and 
white, 1285 grams; the largest, 1736 grams; the smallest, 980 grams. 
Hunt concludes by grouping the brains according to the estimated amount 
of white blood, that the weight varies directly in proportion to the amount 
of white blood. The mulattoes and those more than one-half white have 
brains nearly as large as the pure white and larger than the Negro, 
while those less than one-half white have smaller brains, those with the 
least amount of white blood having smaller brains than the pure Negro. 
Practically the same conclusion is reached by a similar classification of 
the male Negro brains I weighed. The average for the mulattoes is 1347 
grams; for those one-fourth white, 1340 grams; for the one-eighth white, 
1335 grams; for the one-sixteenth white, 1191 grams; but for the pure 
Negro 1157 grams. The difficulty about any such classification is that 
no two individuals may agree as to what constitutes the exact markings of 
the different grades. Only those Negroes should be considered pure that 
show no evidence of any previous crossing with another race at a previous 
time, perhaps the low-class Guinea Coast Negro representing this type 
in the brains studied. Certainly the high-class Guinea Coast Negro and 
the Kaffir (Zulu) show unmistakable evidence of a previous mingling of 
races. (Topinard).™ 
The conclusion is that the brain of the Negro is smaller than the 
brain of the white, the stature is also lower, and the body weight is less, 
and any crossing of the two races results in a brain weight relative 
to the proportion of white blood in the individual. 
The skull capacity of the Negro has been repeatedly demonstrated to 
be less than that of the Caucasian.” 
TEST TO DETERMINE RACE AND SEX OF BRAINS. 
When this work was undertaken I had handled comparatively few 
brains, so I examined about twenty and measured them in various ways 
before attempting to differentiate the Negro from the Caucasian brain, 
