INGESTION OF FAT. 



255 



per cent from carbohydrates. The basal value employed was the 

 average of two values determined a week or more later. Following the 

 ingestion of the cream, measurable increases in carbon-dioxide produc- 

 tion and heat production were observed in the first three periods, with 

 a value essentially basal in the fourth period. The measurements of 

 the oxygen consumption showed practically no variations from the 

 basal value. Apparently the ingestion of the cream affected only the 

 carbon-dioxide production and heat production. 



H. R. D., March 28, 1906. Approximately the same amount of 

 cream was used as in the preceding experiment, 399 grams being taken. 

 The details of this experiment are given in table 185. An increment 

 in carbon-dioxide production was found in all of the periods of the 

 experiment, with an increase in oxygen consumption in the first two 

 periods. The value for the increase in the oxygen in the first period 

 is erroneous, as the respiratory quotient for this period was only 

 0.55. The results obtained from the measurement of the heat produc- 

 tion were irregular, but gave positive increases, although the total 

 increment was small. 



TABLE 185. H. R. D., March 28, 1906. Silting. (2-hour periods.) 

 Cream: 



Amount, 399 grams; 1 nitrogen, 1.71 grams; total energy, 875 cals. 



Fuel value: Total, 860 cals.; from protein, 5 p. ct. ; from fat, 87 p. ct. ;from carbohydrates, 



8 p. ct. 



Nitrogen in urine, 0.76 gram per 2 hours. 

 Basal values (February 6 to April 20, 1906) : CO 2 , 47 grams; O*, 42 grams; heat, 146 cals. 



!Also 9 grams lime-water and 194 grams water, a total of 602 grams. 



A. H. M., April 5, 1906. The subject took 345 grams of cream 

 before this experiment. The basal value used was the average of two 

 values determined approximately 7 weeks before. According to the 

 results given in table 186, increments in the three factors of metabolism 

 were observed in the first and second periods; approximately basal 

 values were obtained in the third period. From this and the two 

 preceding experiments, it is evident that the ingestion of cream had 

 a positive influence upon the metabolism. 



