112 EXAMPLES 



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 



Observations 



Length of trunk 65-4 centimetres 



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 -*- 2 = 25-0 kilos = weight cal- 

 culated. 



Subtracting calculated from observed weight, 

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

 +0-5 x 100 H- 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 -r- 1969 - -0-46%. 



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 -f 2013 -*- 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%. 



