STUDY OF BRAINS OF SIX ExMINENT SCIENTISTS AND SCHOLARS. 



213 



The average (arithmetical) brain-weight of the 108 individuals is 1473 grams, 

 exceeding the various averages given for the European brain by 75 to 100 grams, and 

 this without allowing for the advanced age of the men in this series. 



A better appreciation of the greater average brain- weight of these notable persons 

 can be formed from a glance at the chart (Fig. 1) showing the distribution of "ordi- 



Fig. 1. Chart showing the relatively greater nnmher of heavier brains among the (100) " eminent men " (see solid 

 line) as compared with the distribution of the ordinary brain-weights of the combined series (1334 cases) of BischofF, 

 Marchand and Topinard — tabulated for convenience in comparison on the bases of 100 cases.* 



nary " and " eminent " brain-weights. It shows a relatively greater number of heavier 

 brains among the noted individuals, and the chart in Fig. 2 shows the same relation 

 in another manner. It is further shown that the period of decrease with age is de- 

 ferred for fully a decade among the more intellectual persons, a point already alluded 

 to by Donaldson and significant in connection with the longevity of healthy persons 

 endowed with high intelligence. 



In proceeding to a further analysis it seems best to distribute these men of emi- 

 nence among the three categories of science, creative arts and "action." In submit- 

 ting these lists, the writer feels constrained to repudiate any intention of maintaining 



* Figures 1, 2, 7, 8, 9, 10, 14 and 21 are reproduced here through the courtesy of the editor of the American Anthro- 

 palogist. They served to illustrate a similar but less detailed discussion on brain-weight and brain-size in connection with 

 the author's studies on the brain of Major J. W. Powell. 



