10 Introduction. 



and 1,440 and dividing by 1,000. It is useful in deriving the heat- 

 production when only oxygen measurements are obtained, as, for 

 example, with the various portable forms of clinical respiration 

 apparatus. 



TABLE 15. Comparative scales of kilograms and pounds, centimeters 

 and inches. 



This table shows the equivalent scales of kilograms and pounds 

 from about 8 kilograms to 125 kilograms and of centimeters and inches 

 from 80 centimeters to 200 centimeters. Conversion may be made 

 on the scales in either direction and fractional parts estimated. The 

 table is from "The Treatment of Diabetes Mellitus," E. P. Joslin, 

 1917. The electrotype was furnished through the courtesy of the 

 publishers, Lea & Febiger, Philadelphia. 



FORMULAS AND TABLES FOR CALCULATING BODY-SURFACE. 



TABLE 16. Lissauer formula for calculating body-surface of infants 

 and table giving area calculated for weights from 2.00 to 5.00 

 kilograms. 



The formula for calculating the body-surface of infantsjs that of 

 Lissauer, where area in square centimeters equals 10.3 ^lw 2 , in which 

 w is equal to the body-weight in grams. 



Example of calculation. Body-weight 3,650 grams. 



Logarithm of 3650 = 3.56229 



X 2 



3 |7. 12458 log. of u>* 



2. 37486 log. of J! 

 Logarithm of 10.3 = 1.01284 



Logarithm of surface = 3 . 38770 = 2,442 square centimeters or 0.2442 



square meter. 



The table gives the results of this calculation for each 0.05 kilo- 

 gram from 2.00 to 5.00 kilograms. It is from Benedict and Talbot, 

 Carnegie Institution of Washington, publication 233, 1915, p. 110. 



TABLE 17. Constants for computing surface-area of children from 

 formula: Area = K\lw 2 . 



The table gives the constants to be used for calculating the body- 

 surface of children for weights up to 40 kilograms. The method of 

 calculation is the same as given for the use of the Lissauer formula 

 for infants in table 16. The table is from Benedict and Talbot, 

 Carnegie Institution of Washington, publication 302, 1921, table 14, 

 page 61. 



