Robert Bennett Bean 363 
FicurES 4 TO 8b ON PAGE 362. 
Fig. 4. Left side of the figure, Caucasian male, age 67, No. 1538, length 
185 em., weight 77.1 Kg. Brain outline as viewed from above and from the 
left at an angle of 45°. Right hemisphere. (The outline is inverted). 
Right side of the Figure, Negro male, age 25, No. 1473, length 165 cm., 
weight 72.6 Kg. Brain outline as viewed from above and the left at an angle 
of 45°. Right hemisphere. A, anterior end; R, right side. One-third 
natural size. 
Fic. 5. Negro male, age 45, No. 1681, length 163 cm., large and fat. Verti- 
eal, transverse sections. Section not quite transverse. No. 1 about 15 mm. 
from anterior end of brain; No. 2, about 45 mm. S, superior surface; R, 
right side. One-third natural size. 
Fic. 6. Negro male, age 45, No.’ 1681. Vertical transverse and slightly 
oblique section. The section is about 75 mm. from the anterior end of the 
brain. One-third natural size. 
Fic. 7. Negro male, age 45, No. 1681. The section is about 105 mm. from 
the anterior end of the brain, just anterior to external auditory meatus. One- 
third natural size. 
Fic. 8a. Caucasian female, age 36, No. 1522, length 154 cm., weight 59.2 
Kg. Brain outline as viewed from above, horizontal plane, 1.2., at 90°. A, 
anterior extremity; R, right side. One-third natural size. 
Fic. 8b. Negro female, age 27, No. 1544, length 168 cm., weight 45 Kg. 
Brain outline as viewed from above. One-third natural size. 
vertical line along the anterior aspect of the frontal lobe, and by the 
horizontal line along the inferior border of this lobe; it is manifested in 
the outline from above by the square front and sides of the outline; and 
in the outline with the brain rotated laterally 45°, by the more abrupt 
rise posteriorly, and the depression or apparent flattening over the an- 
terior association center, along with the relative bulging of the posterior 
association center. These differences are seen more plainly in Figure 4 
(brains No. 1473 and 1538) which represents the 45° outlines of a fairly 
typical adult male Caucasian brain, and of a fairly typical adult male 
Negro brain of about the same weight and length. It is the straight line 
seen over the anterior association center in this figure on which especial 
emphasis is laid as a distinctive characteristic of the Negro brain. Look- 
ing at the brain directly from above or from the side one does not so 
readily notice any apparent flattening, but on rotating the brain on its 
axis slightly to one side a glance will often bring it out distinctly; or a 
careful examination, revolving the brain from 10° to 60° from its normal 
position and looking at it from above, will almost invariably disclose this 
peculiarity. In some brains it is well marked, in others only slightly so. It 
usually appears most marked when either hemisphere is rotated through 
an angle of 30° laterally from its normal position and viewed from above. 
Viewed from the side the Negro brain appears to be pressed back, while 
