PREFACE. 



The experiments reported herewith were made with the respiration calorim- 

 eter in the chemical laboratory of Wesleyan University, Middletown, Connecti- 

 cut, at intermittent periods between March 23, 1903, and May 23, 1906, by the 

 aid of grants from the Carnegie Institution of Washington. In the conduct of 

 these experiments we were assisted by Messrs. W. H. Leslie, E. M. Swett, and 

 J. A. Eiche, members of the staff engaged in research in the nutrition of man. 

 The computations and presentation of the results were of necessity deferred until 

 the Nutrition Laboratory was built and at least in part equipped. During the 

 past two years Mr. W. H. Leslie has been engaged in the calculations and tabula- 

 tions, and we have benefited by his helpful editorial criticism. 



Miss A. N. Darling has personally supervised the revision of the entire manu- 

 script and has had charge of the stenographic work, ably assisted by her two 

 associates, Miss K. E. Murphy and Miss I. M. Bates. 



The accurate presentation of these results is in large part clue to the pains- 

 taking care of the computing staff, consisting of the Misses P. E. Kallen, Alice 

 Johnson, and P. H. Colbeth. 



It is a pleasure to acknowledge our thanks to these and other co-workers 

 who made the prosecution of this inquiry possible. Our thanks are also due 

 to the large number of individuals who volunteered as subjects in the various 

 experiments. Among these, special mention should be made of Dr. J. H. Kel- 

 logg and Mr. Horace Fletcher. 



Nutrition Laboratory, Carnegie Institution of Washington, 

 Boston, Massachusetts, January llf, 1910. 



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