NUTRITION LABORATORY. 221 



Dr. Fritz B. Talbot has cooperated in the investigation upon the 

 metabolism of normal children from 2 to 12 years of age, which was 

 carried on in the room specially equipped by the Nutrition Laboratory 

 at the New England Home for Little Wanderers. The cordial co- 

 operation of the superintendent of the home, Dr. Frederic H. Knight, 

 has been very much appreciated. 



Dr. J. Arthur Harris, of the Station for Experimental Evolution, 

 has completed his statistical elaboration of data on basal metaboHsm 

 obtained at the Nutrition Laboratory and the results are now in press. 



Recognizing the great importance of determining the influence 

 of food taken between meals, Mrs. Cornelia Golay Benedict has 

 cooperated in a careful study of the calorific values, as determined 

 with the bomb calorimeter, of many of the extra foods which are 

 becoming more and more a feature of the daily calorific intake of a 

 large number of people. 



Dr. F. W. Rolph, of the University of Toronto, spent several weeks 

 at the Laboratory during the spring of 1918, studying various types 

 of respiration apparatus in use here. By arrangement with Professor 

 Andrew Hunter, of the University of Toronto, he secured a complete 

 chnical respiration chamber constructed in the Nutrition Laboratory, 

 as well as one of the new portable respiration apparatus. During his 

 stay the Laboratory derived much profit from his counsel. 



Dr. Paul Roth, of the Battle Creek Sanitarium, was actively identi- 

 fied in the research on undernutrition. Indeed, on account of the 

 critical illness of Dr. Carpenter, it is safe to say that without Dr. 

 Roth's cooperation the investigation would hardly have been possible. 



INVESTIGATIONS IN PROGRESS. 



Metabolism of normal children. — As considerable data had been 

 accumulated on the basal metabolism of children from birth to 2 years 

 of age, the extension of this study to children from 2 years of age to 

 puberty was deemed necessary. Consequently, in cooperation with 

 Dr. Fritz B. Talbot, a small clinical respiration chamber and accessory 

 apparatus were installed in the New England Home for Little Wan- 

 derers and studies of the basal metabolism of children of both sexes 

 were made continuously with the active assistance of Miss Inza A. Boles 

 of the Nutrition Laboratory and Mrs. Dorothy A. Peabody. The 

 accumulation of data has proceeded in an unusually rapid and satis- 

 factory manner. 



Studies of metabolism with varying environmental temperatures. — The 

 popular conception of an intimate relationship between environmental 

 temperature and heat loss and the importance of knowing the laws 

 governing heat loss have led to an extended study of the influence of 

 varying environmental temperatures upon metabolism. With the 

 ordinary individual, especially in the nude condition, a slight lowering 



