184 A BIOMETRIC STUDY OF BASAL METABOLISM IN MAN. 



Substituting constants, we have the following prediction equations 

 based on our principal series. 



For the Gephart and Du Bois selection, N =72 h= 1 11. 296+ 14.876 M> +3.300 s. 



For the 64 men not included in Gephart and Du Bois selection, 



h= -603.317+12.488 w+8.275 s. 



For all men of both series, N = 136 h= -314.613+13.129 w+6.388 s. 



For the original women, N = G8 h= 664.012 + 10.441 w+0.753 s. 



For supplementary series of women, N = 35 h = 477.082+ 5.577 w+3.237 s. 



For all women, N = 103 h= 713.016+ 8.063 to+1.116 s. 



These equations have been used for purposes of prediction and the 

 calculated heat-productions compared with the actually observed pro- 

 ductions, just as was done in the preceding sections in prediction from 

 standard average values or by means of a linear equation based on one 

 bodily measure only. 



Thus w r e have predicted the total heat-production of the 64 indi- 

 viduals not included in the series selected by Gephart and Du Bois 

 from equations based on stature and body-weight in the Gephart and 

 Du Bois selection. Conversely, to secure a more exhaustive test of 

 the value of our prediction formulas, we have estimated the total heat- 

 production of the 72 individuals constituting the Gephart and Du Bois 

 selection from the data of the 64 other males. Similarly, the total 

 heat-production of the 35 supplementary women has been predicted 

 from equations involving the constants for stature and body-weight 

 in the original feminine series, and the values for the individuals of the 

 original series have been predicted from the data of the supplementary 

 series of women. Details are given on pages 161-176, tables 60-68. 



The reader will bear in mind the fact that these predictions and 

 comparisons with actually observed constants have been made for the 

 purpose of determining the most suitable method for estimating the 

 metabolism of a subject. The division of our materials to make this 

 test possible naturally increases somewhat the probable errors of the 

 constants of the prediction formulas. After the most suitable method 

 for the calculation of the metabolism of an unknown subject has been 

 determined, the constants for actual use in the establishment of stand- 

 ard control or check values will be based upon all the data at our 

 disposal. In examining the results of the prediction of the metabolism 

 of series of individuals by means of equations involving both body- 

 weight and stature, our object has been to ascertain whether this 

 method gave sensibly better results than other methods of prediction 

 hitherto employed. 



Since it has been shown in a preceding chapter that the correlation 

 between stature and metabolism is relatively small as compared with 

 that between body-weight and metabolism, it will be unnecessary to 

 compare the results of prediction by the use of equations involving 

 both stature and body-weight with those based on stature only. A 

 more valuable test of the possible superiority of prediction from both 



