234 



FOOD INGESTION AND ENERGY TRANSFORMATIONS. 



longer; the total excess carbon dioxide is therefore given in a footnote, 

 together with the period of time in which it was obtained. 



DEXTROSE. 



The total increments in the metabolism as a result of the ingestion of 

 dextrose are given in table 174. Considering first only the increments 

 obtained with 100 grams of dextrose, we find that the total increment 

 in carbon-dioxide production ranged from 6.7 to 20.4 grams with an 

 average increment of 12.5 grams. The increase in oxygen consump- 



TABLE 174. Total increment of carbon dioxide, oxygen, and heat following ingestion of 



dextrose in respiration experiments. 



'Period from the time when subject finished eating to the end of the last observation, except 

 in cases when the increment of heat ended earlier. See tables 126 to 139 for complete observations. 

 2 7.1 grams for 4 h 14 m . 3 20.8 grams for 5 h 23 m . 4 18 grams for 4 h 59 m . 6 11.7 grama for 5 h 4 m . 



tion ranged from 0.6 to 8.2 grams with an average of 4 grams, while 

 the increment in heat production ranged from 6 to 35 calories with an 

 average of 18 calories. The average length of the period of observa- 

 tion was 4 hours. In a few instances, namely, the experiments with 

 J. C. C., L. E. E., and H. L. H., additional increments of 1 to 5 grams 

 were obtained by further extension of the measurements. With the 

 ingestion of 75 grams of dextrose the carbon-dioxide increment was 

 reasonably constant, varying only from 5.8 to 8.6 grams with an aver- 

 age of 7.8 grams. The increment in the oxygen consumption ranged 

 from 1.6 to 5.1 grams with an average of 3.5 grams, while the incre- 



