110 EXAMPLES 



Therefore the person has 2% greater vital capacity than she 

 should have according to the Tables for Class A, calculated 

 from the weight of the body. 



To check the vital capacity as calculated from the weight 

 of the body, proceed as follows : 



Vital capacity derived from length of trunk (88-8 cm.) = 



3667 c.c. (from Table XI., Class A). 



Vital capacity derived from circumference of chest (75-0 cm.) 

 = 3438 c.c. (from Table XII., Class A). 



. 3667 + 3438 



Averaging - ~ = 3553 c.c., which is the normal 



ft 



vital capacity for Class A corresponding to the length of 

 trunk and circumference of chest. 



Subtracting the calculated from the observed vital capacity, 

 3630 - 3553 = +77 c.c. 

 + 77 X 100 



3553 



= +2-17%(orroughly+2%). 



Therefore the person has 2% greater vital capacity than she 

 should have according to the Tables for Class A, calculated 

 from length of trunk and circumference of chest. 



Example 2 

 MALE, AGE 13 YEARS 



Weight of body =40-5 kilograms 



Length of trunk =77-1 centimetres 



Observations ~. .. . , _ , . 



Circumference of chest = 72-0 centimetres 



Vital capacity = 2880 cubic centimetres 



CALCULATION 



Weight from length of trunk = 39-73 kilos. 

 Weight from circumference of chest = 39-61 kilos. 

 Averaging 39-73 + 39-61 -s- 2 = 39-7 kilos = weight calcu- 

 lated. 



Subtracting calculated from observed weight, 

 40-5 - 39-7 = +0-8 kilos. 

 +0-8 X 100 -f- 39-7 = +2-01%. 



