46 METABOLISM AND GROWTH FROM BIRTH TO PUBERTY. 



in tables 27 and 28 (pages 116 and 120) and tables 12 and 13 (pages 54 

 and 58) ; they represent, in many instances, not individual measure- 

 ments, but an average of several measurements, at a particular age or 

 weight. On this chart we have arbitrarily sketched a curve showing 

 the general trend of this relationship, the curve (as usual) representing 

 the personal judgments of five different individuals. It is clear from 

 this curve that, with the subjects we have studied, a boy with a height 

 of 110 cm. would weigh approximately 20 kg; on the other hand, a 

 boy weighing 30 kg. would have a height of approximately 134 cm. 

 It is especially to be emphasized that this chart does not take age into 

 consideration, but it more nearly indicates the typical proportions of 

 our children. Since the analysis of the earlier charts demonstrated 

 that our children usually, both for their height versus age and weight 

 versus age, measure up very closely with the Crum-Wood standard, it 

 can be seen that the curve here shown on figure 7 represents not far 

 from the probable usual height-to-weight relationship of boys. 



Cms. 



HEIGHT REFERRED TO BODY WEIGHT. 



GIRLS. 



2kg3.4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 



FIG. 8. Relationship between height and body-weight with girls. 



Our extensive series of measurements of private-school boys enables 

 us to plot on our chart (fig. 7) also the smoothed curve showing the 

 general trend of the relationship between height and weight of these 

 boys. It is of particular interest here to note that the curve showing 

 the relationship between height and weight of private-school boys lies 

 at all points above that showing the height-weight ratio for our labor- 

 atory children. The conclusion is, therefore, that the private-school 

 boys are lighter in weight for the same height than are our laboratory 

 boys. This striking relationship will need special consideration. 



