INGESTION OF MIXED DIETS. 



321 



parison, the active period in the morning from 7 h 15 m a. m. to 8 h 15 m a. m. 

 has been omitted from the table. 



As a result of eating this heavy supper a considerable increment was 

 found for all of the factors of metabolism. That for heat production 

 during the total period of 20 j hours was 334 calories, this correspond- 

 ing to a percentage increment of approximately 23 per cent. A com- 

 parison of the two sitting periods shows a prolonged after-effect of the 

 heavy meal on the morning following its ingestion. 



RESPIRATION EXPERIMENTS. 



In the calorimeter experiments no attempt was made to apportion 

 the increment from period to period and study the time relations to 

 find if there were a "peak" effect. This was possible only with short- 

 period experiments, such as could be made with a respiration apparatus. 

 Unfortunately but two experiments with mixed diet were made with 

 such an apparatus. In both of these experiments the basal value was 

 determined in several periods just preceding the ingestion of the food. 



J. J. C., February 28, 1911. The universal respiration apparatus 

 was used for this experiment of 12 periods (3 periods of fasting and 

 9 periods after food). The diet consisted of 210 grams black bread, 

 15 grams sugar, 25 grams butter, and 500 grams coffee, or a total 

 amount of 750 grams. The fuel value of the diet was 796 calories, of 

 which 11 per cent came from protein, 26 per cent from fat, and 63 per 

 cent from carbohydrates. The results of the experiment are given in 

 table 246. In about 1| hours after the taking of the food, the heat 

 production had increased from 1.16 calories to a maximum of 1.43 



TABLE 246. J. J. C., February 28, 1911. Lying. (Values per minute.) 



Mixed diet: 



Amount, 750 grams; 1 nitrogen, 3.42 grams; total energy, 826 cals. 

 Fuel value: Total, 796 cals.; from protein, lip. ct.; from fat, 26 p. ct.; from carbo- 

 hydrates, 63 p. ct. 



Includes 500 grams coffee. 



2 Subject ate between 



and 10 h 54 m a. m. 



