44 METABOLISM AND GROWTH FROM BIRTH TO PUBERTY. 



Yrs. 2 4 6 8 10 12 i^ 10 10 t.\j 

 FIG. 6. Relationship between height and age with girls. 



they do not exhibit a corresponding underheight. Hence it appears 

 (although this is not the place for discussion) that our girls were 

 slightly under weight on the basis not only of age but likewise of height. 

 The private-school girls, as in all the other curves where the private- 

 school children are charted, show a clear superiority in height for age. 



GENERAL CONSIDERATION OF THE RATIOS OF WEIGHT TO AGE AND 

 HEIGHT TO AGE WITH BOYS AND GIRLS. 



From figures 3, 4, 5, and 6 it appears that the data for our laboratory 

 children agree for the most part very closely with the average values 

 found by Crum-Wood for these ratios, and that they are in general 

 notably above the measurements of the two foreign observers, although 

 in the case of our girls there is inferiority in weight after the age of 

 8 years. The private-school data, on the other hand, both Holt's 

 and our own, indicate superiority not only in weight for age, but 

 likewise in height for age throughout the entire age-range studied. 

 This speaks for a distinctly better type of youth in our private schools. 

 It is questionable whether this is due, first, to the growth actually 

 made in the private schools during the course of time, or to the fact 

 that the children entering private schools come from a better class of 

 people, from a better social economic plane, and, particularly, receive 



