190 



FOOD INGESTION AND ENERGY TRANSFORMATIONS. 



J. J. C., April 7, 1909 (648 grams bananas, 77 grams sugar, with 

 a total fuel value of 962 calories). The basal value for this experi- 

 ment was obtained on the same day. The data given in table 115 record 

 a striking increase in carbon-dioxide production for all of the periods, 

 also an increase in oxygen consumption and heat production, the incre- 

 ment of the three factors being reasonably comparable. The respira- 

 tory quotients were high, reaching 1.02 in the second period. We 

 have here, therefore, a distinct increase in the metabolism as measured 

 not only by the respiratory exchange but by the heat production. 



F. M. M., April 8, 1909 (611 grams bananas, 9 grams sugar, with 

 a total fuel value of 655 calories). The results obtained in the three 

 1-hour periods indicate a considerable rise in carbon-dioxide production, 

 oxygen consumption, and heat production, although the increment in 

 the heat production in the last two periods was not very marked. 

 (See table 116.) The respiratory quotients increased from 0.82 to 

 0.90 as the experiment progressed. 



TABLE 116. F. M. M., April 8, 1909. Sitting. (1-hour periods.) 



Bananas and sugar: 



Amounts, 611 grams bananas, 9 grams sugar; nitrogen, 1.26 grams; total energy, 666 cals. 

 Fuel value: Total, 655 cals.; from protein, 5 p. ct.; from fat, 5 p. ct.; from carbohydrates, 



90 p. ct. 



Nitrogen in urine, 0.51 gram per hour. 



Basal values (April 8, 1909): COz, 23.5 grams; O 2 20.5 grams; heat, 1 79 cals.; respiratory 

 quotient, 0.82. Nitrogen in urine, 0.39 gram per hour. 



eliminated corrected for change in body-weight, but not for change in body-temperature. 

 2 Subject finished eating 30 minutes after the beginning of this period. The eating occupied 

 18 minutes. 



BANANAS. 



In February 1910, three experiments were made in Boston with 

 bananas only. One of the subjects had been used in two of the series 

 of experiments previously considered. 



F. M. M., February 8, 1910 (400 grams bananas, with a fuel value 

 of 406 calories). In the first two periods there were small increases 

 in the carbon-dioxide production with essentially a basal metabolism 

 in the last two periods. (See table 117.) A slight rise in the oxygen 

 consumption in the first period was in large part compensated by values 

 slightly less than basal in the last three periods. The same general 

 picture was observed with the heat production. The respiratory 



