Metabolism Experiment No. 102. 



29 



Balance of intake and output of nutrients and energy. Comparing the nutri- 

 ents and the energy absorbed from the food with the material katabolized 

 shows many interesting points. The results have been calculated and placed 

 in table 15. It is there seen that the diet furnished a somewhat liberal amount 

 of protein, inasmuch as some 14 grams were stored during the 24 hours. There 

 was a loss of 58 grams of body-fat and a loss of 25 grams of glycogen; con- 

 sequently it is seen that there was a large deficiency in energy amounting to 

 565 calories. It is clear, therefore, that this diet did not suffice for maintain- 

 ing this subject in energy equilibrium. 



Table 15. Balance of intake and output of nutrients and energy, Apr. 17-1S, 1903, 

 7 a. m. to 7 a. m. Metabolism experiment No. 102. 



1 Calculated by means of average coefficient of digestibility of protein, 90.5 per cent. 



2 Calculated by means of average coefficient of digestibility of fat, 95.2 per cent. 



8 Calculated by means of average coefficient of digestibility of carbohydrates, 97.5 per cent. 

 4 From results in columns (a) (d) and (g) in terms of body-material, factors 5.65, 9.54. and 

 4.19 calories respectively. 



COMPARISON OF FACTORS OF METABOLISM. 



The relations existing between the oxygen consumption, carbon-dioxide pro- 

 duction, and heat elimination are calculated and presented in table 16. As 

 an index of the material burned in the body, the respiratory quotient is of great 

 value. Here it is found to fluctuate between 0.80 and 0.85, the largest quotients 

 appearing during the day, when the carbohydrates were ingested, and the 

 smaller quotients during the night, when the combustion of carbohydrates is 

 at the minimum. 



Table 16. Oxygen and carbon-dioxide thermal quotients and respiratory quotients 



Metabolism experiment No. 102. 



1 Heat production. 



