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Robert Bennett Bean 36: 
FIGURES 9a TO 11 ON PAGE 364. 
Fig. 9a. Caucasian female, age 36, No. 1522, length 154 cm., weight 59.2 
Kg. Brain outline as viewed from the mesial side. Left hemisphere. One- 
third natural size. 
Fic. 9b. Negro female, age 27, No. 1544, length 168 cm., weight 45 Kg. 
Brain outlines as viewed from the mesial side. Left hemisphere. One-third 
natural size. 
Fic. 10a. Caucasian female, age 36, No. 1522, length 154 cm., weight 59.2 
Kg. Brain outline as viewed from above and to the right at an angle of 45°. 
Left hemisphere. One-third natural size. ’ 
Fic. 10b. Negro female, age 27, No. 1544, length 168 cm., weight 45 Kg. 
Brain as viewed from above and to the right at an angle of 45°. Left hem- 
isphere. One-third natural size. 
Fic. 11. Unbroken line represents the composite of 45 Negro male outlines 
as viewed from above and to the left at an angle of 45°. Right hemisphere. 
The broken line represents the composite of 45 Caucasian male outlines 
also viewed from above and to the left at an angle of 45°. Right hemisphere. 
One-third natural size. 
the Caucasian appears to be pushed forward, the result being that the 
frontal lobe of the Negro brain appears considerably smaller than that 
of the Caucasian. This difference is greater than is apparent in the 
outlines, because the gyrus rectus in the Negro brain is low, while the 
superior orbital plate passes well up into the frontal lobe outside of this, 
materially diminishing the size of this lobe, the gyrus frontalis superior 
also projecting upward in Negro brains more than in the Caucasian. 
This is shown in Figures 5 to 7, brain No. 1681, from a typical adult 
male Negro. The drawings are made from sawed sections of the frozen 
head, showing the brain in situ, no distortion of the brain being apparent. 
In this thére may be observed the extremely small frontal lobes; the pro- 
jection downward of the gyrus rectus; the deep impression of the superior 
orbital plates; the straight lines along the sides anteriorly, showing the 
lateral surfaces of the brain to be at an angle of 45° from the vertical 
plane; the upward projection of the gyrus frontalis superior; the box- 
like appearance of each outline; and the great bulging in the parietal 
region. The female Negro brain may differ somewhat from that of the 
male, but in general the same peculiarities are noticeable in each. Fig- 
ures 8* to 10> exhibit a characteristic adult female Negro brain and a 
small adult female Caucasian brain for comparison, the two being selected 
because they are so nearly alike, yet the racial differences are noticeable. 
The frontal lobes of the female Negro brain are long and slender, while 
the parietal region is full and bulging. The peculiaries noted in the 
other outlines may be seen in these also. 
Examination of about fifty Negro skulls, and hundreds of Negro heads 
has convinced me of a noticeable characteristic: the appearance to be 
