LETTER OE TRANSMITTAL 



U. S. Department of Acjriculture, 



Office of Experiment Stations, 

 Washiugtun, D. C, January 20, 1905. 

 Sir: I have the honor to transmit herewith a report of dietary studies with Harvard 

 students carried on by Edward Mallinckrodt, jr. The desirability of such an inves- 

 tigation was suggested by Prof. F. G. Peabody, D. D., of Harvard University, and 

 the work was carried out under the general direction of Prof. C. R. Sanger, a thesis 

 based on the results being presented to the University by Mr. Mallinckrodt for the 

 master's degree. The dietary studies were conducted in accordance with the methods 

 devised in connection with the nutrition investigations carried on under the auspices 

 of this Office, of which Prof. W. O. Atwater is in charge, and throughout the inves- 

 tigation Mr. Mallinckrodt was in consultation with Professor Atwater. Acknowl- 

 edgment should be made to Dr. E. A. Darling and Dr. D. A. Sargent, of Harvard 

 University, for cooperation in determining the physical condition and strength of 

 the subjects. The results oljtained are of especial value in their bearing upon dietary 

 standards, particularly those of students and others of sedentary occupation, and 

 are interesting in other ways. The report is therefore respectfully submitted with 

 the recommendation that it be published as Bulletin No. 152 of this Office. 



Respectfully, 



A. C. True, Director. 



Hon. James Wilson, 



Secretary of Agriculture. 



CONTENTS. 



Page. 



Introduction ^ 



General plan '^ 



The system at Randall Hall ... -4 



Details of the dietaries 13 



Dietary study No. 401 13 



Dietary study No. 402 17 



Dietary study No. 403 21 



Dietary study No. 404 25 



Dietary study No. 405 29 



Dietary study No. 406 32 



Dietary study No. 407 35 



Dietary study No. 408 39 



Dietary study No. 409 42 



Dietary study No. 410 46 



Discussion of results 50 



Method of computing the dietaries 50 



Randall Hall dietaries compared with those of other students 53 



Food supply in relation to body weight 56 



The strength tests 57 



General physical condition of the subjects 59 



Mental work of the subjects 60 



Conclusions 61 



(2) 



