192 



FOOD INGESTION AND ENERGY TRANSFORMATIONS. 



Dr. H., February 17, 1910 (397 grams bananas, with a fuel value 

 of 403 calories). There was a marked increase in the carbon-dioxide 

 production in all of the four periods. (See table 119.) The oxygen 

 consumption showed considerable irregularity, although the results as 

 a whole indicated a definite increase. The computations of heat 

 production also gave irregular results, but on the average showed a 

 distinct increase. While this experiment can not be considered as a 

 good duplicate of the experiment on February 14, yet they both imply 

 an increased metabolism as a result of eating bananas. 



TABLE 119. Dr. H., February 17, 1910. Silting. (1-hour periods.) 



Bananas: 



Amount, 397 grams; nitrogen, 0.83 gram; total energy, 410 cals. 



Fuel value: Total, 403 cals.; from protein, 5 p. ct.; from fat, 6 p. ct.; from carbohydrates, 



89 p. ct. 



Basal values (February 17, 1910): CO2, 21.5 grams; 62, 20.5 grams; heat (computed), 67 cals.; 

 respiratory quotient, 0.77. Nitrogen in urine, 0.30 gram per hour. 



Subject finished eating 19 minutes after the beginning of this period. 

 10 minutes. 



POPCORN. 



The eating occupied 



The use of an insoluble carbohydrate in a fruit (banana) presented 

 certain facilities for the absorption and digestion of carbohydrate that 

 would not obtain if starch were given. To approximate starch and 

 still make the diet fairly palatable, we used popcorn in two of the 

 Middletown experiments. 



H. B. W., April 9, 1907 (187 grams popcorn, with a fuel value 

 of 796 calories) . A basal value obtained 5 days before the experiment 

 was used for comparison. Decided increments in the carbon-dioxide 

 production are recorded in table 120 for all periods. A positive incre- 

 ment in oxygen consumption was noted in the first period, with slight 

 fluctuations above or below the basal value in the three remaining 

 periods. An increment in heat production was noted in all four periods, 

 this paralleling the increment found in the carbon-dioxide excretion. 

 The respiratory quotient was high throughout the entire experiment. 



A. H. M., April 10, 1907 (199 grams popcorn, with a fuel value of 

 847 calories). In the second experiment with popcorn an increment 



