538 



HEIGHT AND WEIGHT IN RELATION TO BUILD. 



CONCLUSIONS. 



Chart K illustrates the changes which take place in the height-weight index of 

 build during growth compared with the corresponding changes in volume of the 

 chief parts of the body. 



zo 



25 



Height-weight 

 index 

 90 



Head 

 80 



Larynx 

 70 



060 



U- 



o 



50 



Trunk and 

 neckto top 

 of larynx 



1- 



2 

 bJ 

 O 



Crotch 



Legs 



Feet 10 



Arms 



Forearms 

 Hands o 



HEIGHT IN INCHES 

 40 45 50 55 



\ 



60 



65 



Relative 

 volume of 

 Head 



Trunk 



and 



neck 



to top of 



larynx 



Thighs to 

 crotch 



Legs 



Feet 



Arms 



Forearms 

 Hands 



M 4mo I3/2010 ZVzyr. 4yyr. Bteyr- 9 yr Il 3 /tyr. 



F V/zma. ISmo Z'/ayr 4/yr. 6yr. 9'Ayr. ll'/zyr. 



APPROXIMATE ASE 



14 yr 16 yr I8*yr 

 !3 3 /+yr. 16'yr 



For description see p. 493. 



CHART K. Relative volume of the head to the level of the top of the larynx, of the trunk from here to the crotch, of 

 the inferior extremities with their piincipal subdivisions, and of the superior extremities with their subdivisions. 

 Light curved lines divide the volume of one part from that of another. The vertical lines represent stature in 

 inches as shown at the top. The horzontal lines indicate percentage of total volume as shown at the left. The 

 approximate age in years at which a given stature is reached is at the bottom. The typical height-weight- 

 index growth-curve is shown by heavy line. Female curves, where they differ markedly from those of the male, 

 are shown by dotted lines. The data on which this chart is based are given in table K. 



In the use of the height-weight index of build as a method of estimating and 

 recording the proportions of the body the following facts should be kept in mind : 



1. The height-weight index is altered by the changes in external form which charac- 



terize post-natal morphogenesis in all individuals, by "physiological age." 



2. The height-weight index is influenced by sexual peculiarities of structure. 



3. The height-weight index is influenced by inherited individual or racial peculiarities 



of structure which may manifest themselves at any period of the life-cycle. 



4. The height-weight index is influenced by peculiarities of structure due to habits of 



living or to environment. 



