STUDY OF BKAINS OF SIX EMINENT SCIENTISTS AND SCHOLARS. 



237 



The third method of measurement, and one which readily affords a means of un- 

 derstanding the relative expanse — be it preponderance or a reduction — of the lobes or 

 special cortical areas of one side as compared with the other, and of one brain as com- 



/OO CenkUmah' 



100 Centesimals. O 



Fig. 21. Showing some useful methods ot brain-measurement and indicating the important points employed in the 

 author's system. 



pared with others, is one which was used to some extent by Hrdlicka and which the 

 writer has ventured to amplify. The method of procedure is as follows : A horizontal 

 plane passing through the ventral border of the frontal and occipital poles at the 

 mesal border, as shown by the line AB in Fig. 21. This horizontal plane has the addi- 

 tional advantage of being parallel to Chipault's plane referred to the skull. A plane 



