VI PREFACE 



ment which are more familiar to physiologists. We shall appreciate 

 the fullest criticism by fellow physiologists, biologists, and statisticians, 

 but criticisms to carry weight must be based on either statistical or 

 physiological foundations and not merely the ex cathedra expression of 

 the personal opinion that the new line of attack is valueless. 



We are presenting this volume, not as a finished treatment of the 

 subject of basal metabolism, but merely as an introduction to the many 

 problems which await solution by the use of the more refined methods 

 of analysis when more extensive data are available. 



Nutrition Laboratory of the Carnegie Institution 

 of Washington, Boston, July 10, 191S. 



