Metabolism Experiment No. 76. 



201 



In table 142, the computed energy of the body material katabolized is com- 

 pared with the daily heat produced (column d, table 141). 



Table 142. Comparison of energy derived from katabolized body material with 

 total heat production Metabolism experiment No. 76. 



Relations between Oxygen Consumption, Carbon Dioxide Elimination, and Heat 



Pkoduction. 



In table 143 are recorded the oxygen and carbon dioxide thermal quotients 

 and the respiratory quotients per period and per day. 



EFFECT OF INGESTION OF FOOD. 



Diet. The food consisted of milk, gluten crackers, apple, orange juice, and 

 a small quantity of a breakfast food which was added to the diet at the request 

 of the subject. The results of the analyses of the different food materials 

 and of the feces for the experimental period are given in table 144. The 

 amounts of food eaten and the composition and heat of combustion are shown 

 in table 145, together with the weight and composition of the feces. Feces 

 were not passed until the morning of March 13 (total weight, 28.1 grams). 

 The last previous defecation was at 9 h 10 m a. m., March 4. 



Elements and materials absorbed from food. The usual custom of assign- 

 ing to each day one-third of the feces separated for the experiment was here 

 followed, and since the daily intake of food was constant it is assumed that 

 there was a constancy in the elements absorbed from the food when computed 

 according to the usual method of deducting the elements of the feces from 

 the elements of the food. The quantities of water consumed, however, varied 

 from day to day, and hence the remarks made in the discussion of experi- 

 ment No. 74 regarding the computation of the quantities of material absorbed 

 from the food apply also here. The data in terms of elements for the first 

 day of the experiment are shown in table 146. The average daily amounts 

 of materials absorbed, as computed by the formulae, are as follows : Protein, 



