INDIVIDUALS AND MEASUREMENTS CONSIDERED. 33 



group of 16 athletes and computed all the constants upon which we 

 have based our arguments for the individuals of this group alone. 

 The smallness of the number of individuals available necessarily 

 results in relatively high probable errors. The same course was also 

 followed for the male vegetarians, but the number of these was so 

 small that many purely statistical difficulties arose, and since the 

 metabolism of vegetarians has not been shown to differ significantly 

 from that of men at large, 23 we have omitted the discussion of this 

 group. 



After the segregation of these two groups, the athletes and the 

 vegetarians, there remain 62 other individuals, which have been used 

 as the basis of another series of correlations. These are designated as 

 the "men of the original series other than athletes and vegetarians," 

 or for convenience merely as the "other men." 



The constants are also computed for the whole series of 89 men of 

 the original series. 



When the first supplementary series became available it was treated 

 as a whole in the case of men and also combined with the total men of 

 the first series. 



The same course was followed when, before the completion of the 

 long routine involved in the calculations, the second supplementary 

 series fortunately came to hand. 



To avoid all possible objections which might arise from the fact 

 that the individuals included were selected and the groups limited by 

 one or the other of the authors of this report, we have felt it desirable 

 to work out the constants on the basis of materials grouped for purposes 

 quite different from the present ones by some other investigator. 



Most fortunately this has been done by such experienced workers 

 as Gephart and Du Bois 24 who have combined their own 7 metabolism 

 determinations for men with 72 of the 89 published by Benedict, 

 Emmes, Roth, and Smith, for the purpose of obtaining an average 

 metabolism constant. 



From the 89 men of our original adult series, Gephart and Du 

 Bois have seen fit to discard 17. While we shall discuss the validity of 

 their reasons for this course, we are heartily glad to have at our dis- 

 posal, for comparison with the groupings of subjects arranged or 

 limited by ourselves, those which have been approved by others whose 

 training and personal experience in the clinic justifies them in passing 

 judgment upon such matters. The elimination has been made by 

 Gephart and Du Bois in the following manner : 



"All those over 50 years of age were arbitrarily excluded and also those 

 under 20 years of age." 



!3 Benedict and Roth, Journ. Biol. Chem., 1915, 20, p. 231. See also page 245 of this volume. 

 24 Gephart and Du Bois, Arch. Intern. Med., 1915, 15, p. 858. 



