EXAMPLES 121 



Therefore the person has 174% too little vital capacity for 

 Class A by weight. 



Vital capacity from length of trunk = 3211 c.c. 



Vital capacity from circumference of chest = 3143 c.c. 

 Averaging 3211 + 3143 4- 2 = 3177 c.c. = (vital capacity 

 calculated from length of trunk and circumference of chest). 

 Subtracting calculated from observed vital capacity, 



3100 - 3177 = -77 c.c. 



-77 X 100 * 3177 = -2-42%. 



Therefore the person has 2-42% too little vital capacity for 

 Class A by length of trunk and circumference of chest. 



Example 14 



MALE, AGE 9 YEARS 



Weight of body = 71 Ib. 



Observations 



Length of trunk = 28% inches. 



Circumference fo chest = 26% inches 

 Vital capacity = 2390 c.c. 



CALCULATION 



Weight from length of trunk = 70 91 Ib. 

 Weight from circumference of chest = 71 67 Ib. 

 Averaging 70-91 + 71-67 -5- 2 = 71-29 Ib. = weight calcu- 

 lated. 



Subtracting calculated from observed weight, 

 71-00 - 71-29 = -0 29 Ib. 

 -0 29 X 100 + 71-29 = -0-41%. 

 Therefore the person is 0-41% too light. 



Vital capacity from weight = 2330 c.c. (Class B) = (vital 



capacity calculated from weight). 

 Subtracting calculated from observed vital capacity, 

 2390 - 2330 = +60 c.c. 

 +60 X 100 H- 2330 = +2-58%. 



Therefore the person has 2-58% too great vital capacity for 

 Class B by weight. 



Vital capacity from length of trunk = 2328 c.c. (Class B). 



