EXAMPLES 115 



Therefore the person has 0'46% too little vital capacity for 

 Class B by weight. 



Vital capacity from length of trunk = 1869 c.c. (Class B). 

 Vital capacity from circumference of chest = 2013 c.c. 



(Class B). 



Averaging 1869 + 2013 -s- 2 = 1941 c.c. (Class B) = (vital 

 capacity calculated from length of trunk and circumference of 

 chest). 



Subtracting calculated from observed vital capacity, 

 1960 - 1941 = +19 c.c. 

 + 19 X 100 ^ 1941 = +0-98%. 



Therefore the person has 0-98% too great vital capacity for 

 Class B by length of trunk and circumference of chest. 



Example 7 



FEMALE, AGE 9 YEARS 



{Weight of body = 28 6 kilograms 



Length of trunk = 65 7 centimetres 



Circumference of chest = 59-0 centimetres 



CALCULATION 



Weight from length of trunk = 24 78 kilos. 

 Weight from circumference of chest = 25 41 kilos. 

 Averaging 24 78 + 25 41 -f- 2 = 25-1 kilos = weight calcu- 

 lated. 



Subtracting calculated from observed weight, 

 28 6 - 25 1 = +3-5 kilos. 

 + 35 X 100 + 251 -- +13.94%. 

 Therefore the person is 13-94% too heavy. 



Example 8 



MALE, AGE 20 YEARS 



Weight of body = 59 8 kilograms 



Length of trunk = 90 2 centimetres 



Observations . c . , Qr n 



Circumference of chest = 86 centimetres 



Vital capacity = 4700 cubic centimetres 



