Anatomical Characters of tlie Human Brain. 3 



sulcus and including below its share of basal ganglia. The average 

 weight of Broca's frontal lobe is 43,5 per cent for men and 43,7 per 

 cent for women, thus contradicting what has been asserted by Huschke 

 and by Meynert. When the brain is distorted, due to artificial 



Male. 



Female. 



Weight of the Frontal Lobe per 1000. 



During development. 



" middle age. . 



" old age. ... 



" all ages. . . . 



deformity of the skull, this percentage remains practically un- 

 changed.^ I have been unable to consult Broca's original papers, but 

 Professor Donaldson has kindly sent me the necessary data which 

 I append in a foot-note." 



^Ambialet. La Deformation Artificlelle de la Tete, etc. Tonlonse, 1893. 



''In Broca's collected papers, Memoires Anthropologiques, T. V., page 131, 

 under the title, "Sur le poid relatif des deux hemisphere cerebreux et de 

 leur lobes frontaux," he gives a brief statement to the effect that he 



