118 EXAMPLES 



AMERICAN STANDARD SYSTEM 

 Example 11 



FEMALE, AGE 21 YEARS 



Weight of body = 136 Ib. 11 oz. 



Observations 



Length of trunk = 35 inches 



Circumference of chest = 29^ inches 

 Vital capacity = 3630 c.c. 



CALCULATION 



Weight derived from length of trunk (35 in.) = 143-18 Ib. 

 (from Table XIX.). 



Weight derived from circumference of chest (293^ in.) = 

 129-99 Ib. (from Table XX.). 



143-18 + 129-99 



Averaging ~ = 136-09 Ib., which is the nor- 



mal weight corresponding to the observed length of trunk and 

 circumference of chest. 



Subtracting the calculated weight from the observed weight, 

 136-69 - 136-09 = +0-60 Ib. 

 +0-60 X 100 -5- 136-09 = +0-44%. 



Therefore the person weighs 0-44% more than she should weigh 

 according to the Tables. 



Since by the above calculation the person's weight is found 



to be practically normal, the vital capacity as calculated from 



the observed weight will be approximately correct; therefore 



Vital capacity derived from weight of the body (136 Ib. 



11 oz.) = 3556 c.c. (from Table XXII., Class A). 



Subtracting the calculated from the observed vital capacity, 

 3630 - 3556 = +74 c.c. 

 +74 X 100 -f- 3556 = + 2"08% (or roughly +2%). 



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: 



