114 EXAMPLES 



Subtracting calculated from observed vital capacity, 

 2140 - 2194 = -54 c.c. 

 -54 X 100 -^ 2194 = -2-46%. 



Therefore the person has 2-46% too little vital capacity for 

 Class C by weight. 



Vital capacity from length of trunk = 2213 c.c. (Class C). 

 Vital capacity from circumference of chest = 2227 c.c. 



(Class C). 



Averaging 2213 + 2227 -=- 2 = 2220 c.c. (Class C) = (vital 

 capacity calculated from length of trunk and circumference of 

 chest). 



Subtracting calculated from observed vital capacity, 

 2140 - 2220 = -80 c.c. 

 -80 X 100 -=- 2220 = -3-6%. 



Therefore the person has 3-6% too little vital capacity for 

 Class C by length of trunk and circumference of chest. 



Example 6 



MALE, AGE 8 YEARS 



Weight of body =25-5 kilograms 



Length of trunk = 65-4 centimetres 



Observations ~. . , , /? 



Circumference of chest = 62-0 centimetres 



Vital capacity = 1960 cubic centimetres 



CALCULATION 



Weight from length of trunk = 23-72 kilos. 

 Weight from circumference of chest = 26-29 kilos. 

 Averaging 23-72 + 26-29 -r- 2 = 25-0 kilos = weight calcu- 

 lated. 



Subtracting calculated from observed weight, 

 25-5 - 25 = +0-5 kilos. 

 +0-5 X 100 4- 25-0 = +2%. 

 Therefore the person is 2% too heavy. 



Vital capacity from weight = 1969 c.c. (Class B) = (vital 



capacity calculated from weight). 

 Subtracting calculated from observed vital capacity, 

 1960 - 1969 = - 9 c.c. 

 -9 X 100 -f- 1969 = -0-46%. 



