290 



FOOD INGESTION AND ENERGY TRANSFORMATIONS. 



consequent impossibility of correcting for changes in body-tempera- 

 ture, may have accounted for this discrepancy. The nitrogen excretion 

 per hour was less than in any of the periods of the former experiment. 

 The increment in both the carbon-dioxide production and oxygen con- 

 sumption is too great, however, not to be taken as a positive effect of 

 the ingestion of the glidine. 



TABLE 220. L. E. E., May 11, 1910. Sitting. (1-hour periods.) 



Glidine: 1 



Amount, 45 grams; nitrogen, 6.24 grams; total energy, 223 cals. 



Fuel value: Total, 168 cals.; from protein, 95 p. ct. ; from fat, 2 p. ct. ; from carbohydrates, 



3 p. ct. 



Nitrogen in urine, 0.40 gram per hour. 

 Basal values (May 11, 1910): CO2, 24.5 grams; O^, 21.5 grams; heat, 2 80 cals.; respiratory quotient, 



0.83. Nitrogen in urine, 0.10 gram per hour. 



'Subject took glidine in 200 grams of water. 



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



J ' . J . C., May 9, 1910. A third experiment was made in which 45 

 grams of glidine were given, but with another subject. The results of 

 this experiment are found in table 221, which shows a considerable 

 increase in all the factors of the metabolism. Even at the end of the 

 4 hours there is no indication that the total increase due to the glidine 

 had been obtained. The respiratory quotients are not far from those 

 which would be expected during the combustion of protein, although 

 it can be computed from the values obtained for the nitrogen excretion, 

 which average 0.58 gram per hour, that the total calories from protein 

 can be only about one-third of the total calories found, the remainder 

 of the metabolism being derived from fat and carbohydrates. 



J. R., May 5, 1910. A larger amount of glidine was taken by this 

 subject than in the three experiments previously discussed, the exact 

 amount being 70 grams, with a nitrogen content of 9.70 grams. The 

 measurements of the metabolism are given in table 222. The oxygen 

 consumption during the second period could not be obtained, but 

 noticeable increments were found in the other periods and also for 

 carbon-dioxide production and heat production in all the periods. 

 It is evident that the effect of the ingestion of this amount of glidine 



