EXAMPLES 109 



Subtracting calculated from observed vital capacity, 



2880 - 3010 = -130 c.c. 



-130 x 100 -*- 3010 = -4-32%. 



Therefore the person has 4 '32% too little vital capacity for 

 Class A by weight. 



Vital capacity from length of trunk 2969 c.c. (Class A). 



Vital capacity from circumference of chest = 2962 c.c. 

 (Class A). 



Averaging 2969 + 2962 -4- 2 = 2966 c.c. (Class A) == (vital 

 capacity calculated from length of trunk and circumference of 

 chest). 



Subtracting calculated from observed vital capacity, 



2880 - 2966 = -86 c.c. 



-86 x 100 -*- 2966 = -2-9%. 



Therefore the person has 2-9% too little vital capacity for Class 

 A by length of trunk and circumference of chest. 



Example 3 



FEMALE, AGE 20 YEARS 



Weight of body = 52-5 kilograms 



Observations 



Length of trunk = 83*8 centimetres 



Circumference of chest = 72-5 centimetres 

 Vital capacity =3100 cubic centimetres 



CALCULATION 



Weight from length of trunk = 53-77 kilos. 

 Weight from circumference of chest = 52-51 kilos. 

 Averaging 53-77 + 52-51 = 106-28. 



106-28 -f- 2 = 53-1 kilos = weight calculated. 

 Subtracting calculated from observed weight, 



52-5 - 53-1 = -0-6 kilos. 



-0-6 x 100 * 53-1 = -1-13%. 

 Therefore the person is 1-13% too light. 



Vital capacity from weight = 3155 c.c. (Class A) = (vital 



capacity calculated from weight). 

 Subtracting calculated from observed vital capacity, 



3100 - 3155 - -55 c.c. 



-55 x 100 +. 3155 = -1-74%. 



