STUDY OF BRAINS OF SIX EMINENT SCIENTISTS AND SCHOLARS. 303 



more than their fellows, shows the converse to be quite as true. Compared with 

 ordinary men, individually and collectively, they have larger callosa (Figs. 76, 77). 

 The callosum of Joseph Leidy exceeds in cross-section area that of any other in this 

 series or recorded in literature. Here again, then, we have an index in somatic terms 

 of how we may distinguish the brain of the genius or talented man from that of per- 

 sons of only ordinary abilities. 



