EXAMPLES 113 



Therefore the person has 0-98% too great vital capacity for 

 Class B by length of trunk and circumference of chest. 



Example 7 



FEMALE, AGE 9 YEARS 



{Weight of body =28-6 kilograms 



Length of trunk =65-7 centimetres 



Circumference of chest = 59 '0 centimetres 



CALCULATION 



Weight from length of trunk = 24-78 kilos. 

 Weight from circumference of chest 25-41 kilos. 

 Averaging 24-78 + 25-41 -*- 2 = 25-1 kilos = weight cal- 

 culated. 



Subtracting calculated from observed weight, 

 28-6 - 25-1 - : +3-5 kilos. 

 +3-5 x 100 +- 25-1 =: +13-94%. 

 Therefore the person is 13-94% too heavy. . 



Example 8 



MALE, AGE 20 YEARS 



Weight of body =59-8 kilograms 



, Length of trunk = 90-2 centimetres 



Observations 1 / i 



j Circumterence ol chest = 86-0 centimetres 



Vital capacity = 4700 cubic centimetres 



CALCULATION 



Weight from length of trunk = 64-98 kilos. 



Weight from circumference of chest = 64-45 kilos. 



Averaging 64-98 + 64-45 -- 2 == 64-7 kilos - weight cal- 

 culated. 



Subtracting calculated from observed weight, 

 59-8 - 64-7 = -4-9 kilos. 

 -4-9 x 100 H- 64-7 - -7-57%. 

 Therefore the person is 7-57% too light. 



The vital capacity calculated from weight will obviously 

 be too small on account of the person being under weight. 



