ENERGY RELATIONSHIPS. 



339 



TABLE 250 Cost of digestion of various food materials, respiration experiments. (Continude) . 



1 From the time when subject finished eating to the end of the last observation, except in casea 

 when the increment of heat ended earlier. For details and method of computation, see tables 

 126 to 168, 215, 234, 246, and 247; also pp. 151 and 152. 



2 Also juice of one lemon; additional energy (11.5 cals.) included in fuel value. 



3 Also juice of one-half lemon; additional energy (5.6 cals.) included in fuel value. 



4 Also 200 grams coffee; additional energy (26 cals.) included in fuel value. 



'Also juice of two-thirds lemon; additional energy (7.6 cals.) included in fuel value. 



Includes 15 grams potato chips. 



7 Also a little butter; not included in amount or fuel value. 



subdivided the experiments according to the preponderance of carbo- 

 hydrate, protein, or fat in the several diets. The experiments in each 

 group have been arranged according to the fuel value of the food intake. 

 The data given in table 249 for the calorimeter experiments will be 

 considered first. 



To indicate when the effect of the ingestion of food ceased, the dura- 

 tion of the increment has been included in table 249. Frequently the 

 basal metabolism was not reached before the experiment ended ; under 

 these conditions the value given is doubtless too low, for it is impossible 

 to assume that the period of increment was coincident with the length 

 of the experiment. In many instances, however, the duration of incre- 

 ment was considerably shorter than the total experimental period. 

 This was true in the calorimeter experiments with sucrose, the only pure 

 carbohydrate studied with the calorimeter. 



It may be noted that a number of 24-hour experiments with mixed 

 diet have been omitted from this table. While the basal value was 

 determined during a complete fast, it seems necessary to recognize the 



