MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 



307 



Table XIX. — Summary of diary — Metabolism i cperiments Nos. 15-11 — Continuei 



Detailed statistic* of ineoira and outgo. — The weight, composition, and heat of combustion of 

 food, feces, and urine are shown in Tables XX to XXIII. The gross income of nitrogen, car- 

 bon, hydrogen, and energy in the food and drink did not vary from day to day, and the outgo of 

 each in the feces was assumed to be uniform in all the 6 days of the 3 experiments. Inas- 

 much as the diet was identical in the different experiments, with the exception of the substitution 

 of whisky and brandy for the commercial ethyl alcohol, this assumption regarding the feces is 

 probably within the limits of experimental error. The elimination of nitrogen in the urine was 

 quite constant during the 6 days within the respiration chamber. During the 4 days of the pre- 

 liminary period itamounted to 11.7, 16, 13.9, and 10.4 grams, respectively. The urine of the daily 

 composite samples decomposed before the heat of combustion could be determined. The heat of 

 combustion of the urine for each day has therefore been computed from that of the composite 

 sample of the 6 days, according to the method employed for computing the carbon and hydrogen 

 on the different individual days from the total carbon and hydrogen eliminated in the urine during 

 the experiment. 



Table XX. — Weight, composition, "//■? h,-,ii of combustion of foods — Metabolism experiments Nos. 15-17. 



Table XXI. — Weight, composition, and heat of combustion of feces— Metabolism experiments Nos. lo-ll 



