88 Heredity and Child Culture 



The pre-adolescent acceleration in growth in 

 weight is earlier, chronologically, for the tall 

 boys or girls than for the short ones. Growth 

 in weight is affected by disease history and 

 the growth and removal of adenoids. * * * The 

 heavy boy or girl at six or nine or ten will 

 be a heavy boy or girl six years later. * * * 

 For weight boys have greater variability ex- 

 cept at the ages of nine to thirteen, inclusive, 

 and at sixteen and seventeen. Girls also 

 fluctuate more in variability in weight than 

 boys." 



These data represent conclusions reached 

 after an intensive study of a fairly homogeneous 

 class of white American school children in that 

 state. 



Many years ago tables of the results of wide- 

 spread and extensive observations throughout 

 the world were published by the American 

 Journal of Psychology.^ It may be of interest 

 to reproduce two of them here for record and 

 reference. 



1 April, 1898. 



