472 



WILLIAM WASHINGTON GRAVES 



to ancient and modern human stocks; (2) that they are unusually constant 

 in transmission from generation to generation; (3) that they are readily 



TABLE 3 



Relative percentages of convex (CV + CV) and scaphoid (ST + ST), CC + CC, CV + ST, 

 ST + CC, CV + CC) types; American schools and universities (white stocks)* 



This table shows the higher the grade, the larger the percentage of convex types, 

 except in grammar school over 9th grade, as follows: 



1. Twelfth grade over graded schools (1-8) 15. 2 



2. Twelfth grade over ninth grade 26. 



3. Honor Roll over graded schools (1-8) 41 . 4 



4. Honor Roll over ninth grade 55. 



5. Honor Roll over twelfth grade 22.0 



6. University sophomores over freshmen 26. 8 



""Classified by W. W. Graves 



accessible features for recognition and accurate classification in the living; (4) 

 that each type remains permanent throughout the life cycle, and (5) that 



