Introduction. 11 



TABLE 18. Du Bois formula and chart for ascertaining body-surface 

 of men and women. 



The Du Bois formula for calculating the body-surface of adults is 

 A = Wt. OA25 X Ht.- 725 X 71.84, where A equals the area in square centi- 

 meters, Wt. the weight in kilograms, and Hi. the height in centimeters. 



EXAMPLE. 



Man, body weight 65.5 kilograms, height 165 centimeters. 

 Logarithm of 65.5 - 425 = 1.81624 X 0.425 = 0.77190 

 1650-725 = 2.21748 X 0.725 = 1.60767 

 71.84 = 1.85637 



Logarithm of area in square centimeters = 4 . 23594 



Area in square centimeters equals 17,216 or 1.72 square meters. 



The chart shows the curves plotted from calculations from vari- 

 ous heights and weights. The body-surface may be estimated from 

 the figure. The ordinates are heights in centimeters, the abscissae are 

 weights in kilograms. The formula and chart are from D. Du Bois 

 and E. F. Du Bois, Archives of Internal Medicine, 17, 1916, p. 865. 



C. M. Wilson and D. Wilson have recently published (Lancet, 1920, 

 ii, p. 1042) a "nomogram" which is more convenient for deriving the 

 body-surface from the height and weight by means of the Du Bois 

 formula. 



FORMULAS AND TABLES FOR PREDICTING BASAL HEAT-PRODUCTION 



FOR 24 HOURS. 



TABLE 19. Formula for predicting basal heat-production of new- 

 born infants per 24 hours. 



The formula for predicting the basal heat-production of new-born 

 infants is h = I (length in centimeters) X 12.65 X 0.103 -\lw\ An 

 example of its calculation is as follows: Infant, length, 52 centi- 

 meters; body- weight without clothing, 3.63 kilograms. 



Logarithm of w (3.630) = 0.55991 



X 2 



3 [1.11982 



Logarithm of 3vfl = 0.37327 



0.103 = 9.0128410 



12.65 = 1 . 10209 



52 = 1.71600 



Logarithm of total calories (h) = 2 . 20420 

 Heat per 24 hours equals 160 calories. 



This formula is applicable up to 8 days of age. It is from Benedict 

 and Talbot, Carnegie Institution of Washington, publication 233, 

 1915, p. 108. 



