Variations in Metabolism. 255 



The results presented in this report are to be considered simply as indicating 

 the normal metabolism of healthy young men at rest and under several condi- 

 tions of muscular activity. The variations from the normal exhibited by the 

 individual can be seen by an examination of the tables. The attempt is made 

 to point out the cause of the variations in so far as possible, but with so com- 

 plex a process as the energy transformation and katabolism in the body, it is 

 clearly futile to attempt to predict with great accuracy either the katabolism or 

 the energy transformations of a given individual. Approximate values that 

 may prove of practical use can be obtained by means of some of the factors 

 outlined in this report. With more accurate and improved calorimeters, there 

 should be in the course of a few years the addition of many factors, at present 

 entirely unknown. 



