18 THE TABLES: EXPLANATORY 



of apparent good health, he is either too light or too 

 heavy in relation to the length of his trunk and the cir- 

 cumference of his chest, it is necessary, before classifying, 

 to consult the Tables dealing with trunk-length and 

 chest-circumference in relation to vital capacity. For 

 it is obvious that if a person is found to be considerably 

 under weight, but shows a vital capacity normal for the 

 length of his trunk and the circumference of his chest, 

 he would appear to possess a remarkably large vital 

 capacity as judged by his weight. On the other hand, 

 if he were found considerably too heavy (by trunk-length 

 and chest-measurement), he would appear to have a 

 vital capacity considerably too small, if judged by his 

 weight, although he might in fact be normal. To judge 

 by such criteria alone would obviously place the too 

 heavy individuals in a class lower than that to which 

 they belong, and the poorly developed individuals in a 

 better class than their condition merits. 



TABLE OF CLASSES* 



CLASS A 



Army and Navy personnel, and any person who has under- 

 gone prolonged training in either Service independent of 

 his ordinary vocation in life. 



Police force. 



Athletes and active sportsmen. 



University students (playing games). 



Boys in Public Schools (playing games). 



Fire department. 



Blacksmiths and boilermakers. 



* Though this Table may serve as a guide in classification, it should 

 be borne in mind that an active outdoor life, sports and games, military 

 training and boy scouting, may bring an individual into Class A inde- 

 pendently of his vocation. 



The same kind of grouping may apply to females, though a relatively 

 larger number of women will be found to belong to Class C. 



