INGESTION OF CARBOHYDRATES. 



185 



carbon-dioxide production in all of the periods and an increment in 

 both the oxygen consumption and the heat production in the first 

 three periods. (See table 109.) With this subject it is clearly evident 

 from the general picture that this amount of maltose-dextrose mixture 

 produced a positive increase above the basal metabolism. Although 

 the respiratory quotient in the first two periods was unusually low, 

 it rose until in the fourth period it was slightly over 1 . 



TABLE 109. J. J. C., March 4, 1910. Sitting. (1-hour periods.) 



Maltose-dextrose mixture: 1 



Amounts, 145 grams maltose-dextrose mixture, juice of one lemon; energy, 449 cals. ; from 



carbohydrates, 100 p. ct. 

 Basal values (March 4, 1910): CO2, 26.0 grams; Oa, 22.0 grams; heat (computed), 74 cals.; 



respiratory quotient, 0.86. Nitrogen in urine, 0.47 gram per hour. 



'Subject finished drinking solution (333 grams) in 17 minutes after the beginning of this period. 



The drinking occupied 4 minutes. 

 'Sample included amount for about 1 hour preceding the taking of maltose-dextrose mixture. 



BANANAS AND SUGAR. 



Bananas and sugar were given in several experiments, as considerable 

 amounts could be consumed and the total energy intake in the form of 

 carbohydrate thus be greatly increased. The results of 7 experiments 

 follow; the experiments with A. L. L., H. R. D., and A. H. M. were 

 made in Middletown, and those with J. J. C. and F. M. M. in Boston. 



A. L, L., March 30, 1906 (765 grams bananas and 99 grams sugar, 

 with a total fuel value of 1,109 calories). A very large increase in the 

 carbon-dioxide production was found in the first period, this being 

 decreased about one-half in the second period. (See table 110.) In 

 the last two periods the amount was essentially the same as the basal 

 value. There was an increase of 17 grains in the oxygen consumption 

 in the first period with practically basal values thereafter. The heat 

 production showed a large increase for the first two periods, but the 

 values were essentially the same as the basal in the last two periods. 

 The respiratory quotients were extraordinarily high and characteris- 

 tic of those following carbohydrate ingestion. In this experiment, 

 therefore, there was a somewhat closer uniformity between the gaseous 

 metabolism and heat production than in many of the earlier experi- 



