INGESTION OF MIXED DIETS. 



317 



are given in table 242. As a result of the ingestion of this food there 

 was a marked increase in the three factors of metabolism which con- 

 tinued throughout the experiment ; the increase in the heat production 

 for the last period amounted to 33 calories. The total increase in heat 

 production of 181 calories represents approximately a 32 per cent 

 increment in this factor; similar percentage increments were noted for 

 carbon-dioxide production and oxygen consumption. 



TABLE 242. H. R. D., February 17, 1906. Sitting. (2-hour periods.) 



Heavy breakfast (mixed diet) : 



Amount, 1,828 grams; nitrogen, 14.64 grams; total energy, 3,439 cala. 



Fuel value: Total, 3,311 cals.; from protein, 12 p. ct.; from fat, 43 p. ct.; from carbohydrates. 

 45 p. ct. 



Nitrogen in urine, 1.25 grams per 2 hours. 

 Basal values (February 6 and 10, 1906): CO 2 , 47 grams; O 2 , 42 grams; heat, 143 cals. 



1 Subject ate food in 51 minutes. 



H. R. D., February 21, 1906. The experiment on this date was prac- 

 tically a duplicate of that with the same subject on February 17, as 

 the diet had approximately the same fuel value. The proportions of 

 energy from protein, fat, and carbohydrate were also approximately 

 the same, although in this experiment a somewhat larger proportion of 

 the energy was supplied by fat with correspondingly less from carbo- 

 hydrates. The breakfast consisted of 81 grams graham crackers, 

 40 grams peanut butter, 26 grams cheese, 89 grams cereal, 56 grams 

 sugar, 76 grams apples, 46 grams bread, 145 grams baked beans, 189 

 grams boiled eggs, 397 grams milk, and 634 grams cream, a total of 

 1,779 grams. The fuel value of the diet was 3,697 calories, of which 

 12 per cent came from protein, 54 per cent from fat, and 34 per cent 

 from carbohydrates. The results of the experiment are given in 

 table 243. Here again we find large increments in the metabolism 

 throughout the experiment, with no evidence of a cessation at the end 

 of the 8-hour experimental period. The total increase in heat produc- 

 tion was not so large as in the experiment on February 17, being only 

 148 calories, or approximately 26 per cent of the basal value. The 

 results show, however, like all of the experiments in this series, a pro- 

 longed stimulus to the metabolism which continued for the entire 

 8 or 9 hours following the ingestion of the food. 



