Trans. Acad, Sci. of St. Louis. 
Mm. ae Age: 
166 | - 
162 it 
i 16 
14 
15 
a oa J KA 
; Y, 2 
0 
eA — 9 
154 + = 8 
7 
ss SELLE 
LE 
150 }— Sea Se ae ae 
ee ra 
ee 
146 +L Fl ee tease a a eal ae 
ag a - 
ae et | 
Be Aa ae oO 
is Coe) ee ops i Es eal 
oes ae 
138 
y 
134 -— 
10 20 30 49 50 60 70 80 90 
Percentile Grades. 
Vou. VI. No. 12. PLATE XVII (from Table No. 25; pages 311, 320). 
Boys’ Width of Head. 
