PRESIDENT’S ADDRESS. 561 
The heads of girls do not follow the same law of growth 
‘as those of boys. At nearly all ages the average cephalic 
index is higher amongst girls, and at the lower ages, up to 
nearly 12 years, the broad-headed type prevails. After 
that year meso-cephalic heads are the most numerous. 
The heads of girls, however, grow more in length than in 
width up to about the 15th year, when the expansion in 
width exceeds the expansion in length. 
The following is a statement of the number of each de- 
scription of head per 1000 girls at each age :— 
Age Group. Broad Heads. | Medium Heads. Long Heads. 
5 to7} years. 592 370 38 
73-to 10° «,; 561 408 | 31 
10 to123 ,, 463 492 45 
123 to1l5 ,, 348 558 94 
over 15, | 406 531 63 
A statement showing the cephalic index at each age 
does not convey so much information as the figures just 
given; but, as it is usual to give a statement of the kind, 
it is here appended : — 
Cephalic Index. 
Age Boys Girls 
54 77°2 79°9 
6 78°1 81°9 
64 78°8 81°3 
7 78°9 80°5 
7} 78°7 82°1 
8 79°72 80°8 
3 79°7 79°4 
9 79°9 g1-4 
94 79 6 80-2 
10 79°0 80°3 
103 80°3 80°3 
11 79°4 79°3 
113 78°5 79°4 
12 79°5 79°4 
123 78°7 78°7 
13 79°3 79°2 
13} 78:9 78°8 
14 79°5 79°0 
144 79°2 78°7 
15 78°2 79°6 
154 79°7 79°6 
16 78:0 77°9 
164 78:1 79°1 
mM 2 
