1923. No. 4. PHYSICAL DEVELOPME.XT OF CHILDREN AND YOUNG PEOPLE. 43 



Average 

 age 



Table 13 c. 

 Tlic higher school. Boys. 



l-f 



9 years 

 10 



12 

 13 

 14 



16 



17 



19 

 20 



44 

 100 



99 

 182 



393 

 445 

 475 

 443 

 254 

 142 



71 

 36 



.188 

 .186 

 .185 

 -174 

 -177 

 .161 



•159 

 .158 



.196 



6.566 



7-055 



8.484 



8-343 

 8.839 

 8.707 

 9.118 

 8.657 

 8.187 

 9.047 

 7-5II 

 8.303 



1. 188 

 1. 186 

 1. 182 

 1. 179 

 r.174 



1. 1 64 



I-I59 



1. 161 



1. 174 

 1. 185 



1.200 



1.222 



9 

 10 

 II 

 12 

 13 

 14 

 15 

 16 



17 

 18 



The 



Table 13 d. 

 higher scliool. 



Girls. 



~t- 0.650 

 + 0.670 



+ 0.451 

 + 0.545 

 ±0.274 

 ± 0.283 



+ 0.291 



+ 0.297 



+ 0.271 



± 0.984 



1-235 



1.227 



I.2I4 



1. 196 



1. 188 

 1.203 

 1.227 



1-255 

 1.283 



1-257 



school at 12 (1.20). This shows, at any rate, that the low index at the 

 higher school is not simply referably to the more advanced development 

 of height, in any way not entirely to this. But we cannot get away from, 

 that the mentioned momentum must play a certain part, in as much there 

 exists a physiological decrease of the weight-height proportion, as the 

 growth in height takes place, and practically goes on until the strongest 

 growth in height is succeeded by a relatively slower. (This takes place 

 for girls after 12, for boys after 16.) If the smaller weight-height pro- 

 portion of the socially better situated children only was dependent on 

 the mentioned quicker growth, then we should expect that at a certain 

 age, reverse from earlier years, would occur just the opposite proportion 

 between the two kinds of schools, — that the higher school would show 

 larger index (beginning at a certain time after 12 — 13 with the girls, 

 and abt. 15 with the boys). From these ages a normal increase of index 

 takes place, wherefore a quicker development now would stipulate higher 

 values. We are unfortunately unable to make such comparison. Without 



