64 



FOOD INGESTION AND ENERGY TRANSFORMATIONS. 



A comparison of the energy as computed from body material katab- 

 olized with the heat production as measured is given in table 18. 



TABLE 14. A. H. M., December 3-6, 1906. (24-hour periods, 7 a. m. to 7 a. m.) 



Mayonnaise, lettuce, and lemon: 



Amount, 213 grams; nitrogen, 0.37 gram; energy, 1,112 calories. 

 Fuel value: Total, 1,109 calories; from protein, 1 per cent; from fat, 98 percent; 

 from carbohydrates, 1 per cent. 



'Subject finished eating about 2f hours after beginning of period. 



TABLE 15. Weight, composition, and heat of combustion of urine in fasting experiment 



with A. H. M., December 3-5, 1906. 



J In terms of creatinine. 



The carbon-dioxide production and oxygen consumption for the two 

 fasting days agree very closely, but there is a difference of approxi- 

 mately 120 calories in the heat production. The respiratory quotient 

 for the first day of fast was 0.81 and for the second 0.77. These values 

 are somewhat higher than the average values found for all the subjects 

 of short fasts recorded in the earlier report, 1 which were for the first day 

 of fast 0.79 and for the second 0.75, although in at least two instances 

 in these short fasts a value was found as high as 0.77 on the second day. 



Benedict, Carnegie Inst. Wash. Pub. No. 77, 1907, p. 451, table 225. 



