NUTRITION LABORATORY. 217 



library cards, abstracts of scientific articles, kymograph records, and similar 

 destructible material that can not readily be replaced have been stored in 

 fireproof steel filing cabinets during the last year. A similar cabinet has 

 been placed upon one of the balconies in the calorimeter room for records 

 that are referred to daily. 



ADDITIONS TO THE LIBRARY. 



Although it is not the intention to acquire a large library, the most impor- 

 tant journals containing articles continually referred to have been purchased 

 from time to time, and back numbers of the journals used by the masters of 

 physiology and physiological chemistry are being gradually accumulated. 

 The value of the library has been much increased by the addition of a full 

 set of the invaluable Index of the Library of the Surgeon General of the 

 Army. The recent volumes of this important series were secured through 

 the kindness of Senator W. Murray Crane. 



Of especial importance is the extensive collection of reprints, which has 

 been added to in great number. In the last five years our collection of re- 

 prints has increased to over 2,200 separates, almost all of which were pre- 

 sented to the Laboratory. Inasmuch as these are nearly all selected papers 

 bearing particularly upon problems of nutrition and metabolism, they of 

 themselves make a very effective working library. 



COOPERATING AND VISITING INVESTIGATORS. 



Dr. E. P. Joslin and his associate. Dr. F. A. Stanwood, have continued 

 their active interest in the researches on the metabolism of diabetics. 



Dr. John Romans has completed the research on the metabolism of the 

 hypophysectomized animals, and preliminary investigations upon the car- 

 bohydrate tolerance of animals have been made. 



The metabolism of normal babies has been studied by Dr. Fritz B. Talbot,, 

 who has supplemented the observations made in the Nutrition Laboratory 

 by an extensive series of pulse-rate observations made in one of the hos- 

 pitals in the city. 



The researches on dogs with part or whole of the pancreas removed, which 

 were begun last year by Dr. Joseph H. Pratt, have not yet been completed. 

 As slight changes were to be made in the apparatus so as to secure accurate 

 determinations of the oxygen consumption, it seemed desirable to discontinue 

 these experiments until the fall of 1912. 



With a view to broadening the significance of the metabolism measure- 

 ments made in the experimental work of the Laboratory, preliminary steps 

 have been taken to institute researches on the psychological effect of the in- 

 gestion of food and of nutritive processes in general. In making these ar- 

 rangements we have been peculiarly fortunate in securing the cooperation 

 and advice of Prof. Raymond Dodge, of Wesleyan University, Middletown, 

 Connecticut, who has developed a remarkable technique and devised appa- 

 ratus for experiments of this nature. 



