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FOOD INGESTION AND ENERGY TRANSFORMATIONS. 



TABLE 201. A. W. W., May 25, 1907. Sitting. (2-hour periods.) 

 Beefsteak: 



Amount, 373 grams; nitrogen, 18.62 grams; total energy, 1,144 cals. 



Fuel value: Total, 981 cals.; from protein, 49 p. ct. ; from fat, 51 p. ct. 

 Basal values (March 15 and 21, 1907) : CO 2 , 50 grams; 62, 41 grams; heat, 155 cals. 



Subject ate beefsteak in 23 minutes. 



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



'Sample included amount for about 1 hour preceding eating of beefsteak. 



BOSTON CALORIMETER EXPERIMENTS. 



Following the construction of the respiration calorimeters 1 in the 

 Nutrition Laboratory, a series of five experiments subsequent to the 

 ingestion of beefsteak was made with the chair calorimeter, beginning 

 on December 4, 1908. The first two were 8-hour experiments, but the 

 last three experiments continued for only 5 or 6 hours. The observa- 

 tions were made in 1-hour periods in all cases. The statistical data not 

 included in the tables or discussion of these experiments are given in the 

 following paragraphs; no additional data were available for L. E. E.: 



J. R., 9 h 45 m a. m. to 5 h 45 m p. m., December 4, 1908. 66.2 kilograms.- 

 Drank water at 10 a. m. (198 grams); urinated 7, 9 h 57 m , Il h 58 m a. m., 2, 

 3 h 59 m , and 5 h 55 m p. m. Head ached after 2 h 30 m p. m. Pulse rate, 62; these 

 records sometimes difficult to obtain and at times pulse rate very low. No 

 records could be obtained last half hour. Respiration rate, 17; but one record 

 obtained after 4 h 45 m p. m. Nitrogen in urine per hour 7 a. m. to 9 h 57 m a. m., 

 0.48 gram. 



F. M. M., 9 h 01 m a. m. to 5 h 01 m p. m., December 10, 1918. 59.8 kilograms.- 

 In seventh period showed tendency to fall asleep; instructed to ring signal 

 bell every five minutes. Urinated 7 h 05 m , 9 h 01 m , Il h 01 m a, m., I h 01 m , 3 h 01 m , 

 and 5 h 01 m p. m. Drank water at 9 h 01 m a. m., Il h 01 m a. m., 2 h 01 m p. m., 

 and 4 h 01 m p. m. (total amount, 998 grams). Pulse rate, 52. Nitrogen in 

 urine per hour 7 h 05 m a. m. to 9 h 01 m a. m., 0.48 gram. 



F. M. M., 8 h 55 m a. m. to 2 h 55 m p. m., December 23, 1908. 59.8 kilograms.- 

 Did not eat all beefsteak provided, owing to pain in stomach; feared that a 

 larger amount might increase pain and prevent experiment. Urinated and 

 defecated at 7 h 30 m a. m., also urinated at 11 a. m., 1 p. m., and 3 p. m. ; drank 

 water at 9 a. m., 11 a. m., and 1 p. m. (681 grams in all). Body-temperature: 

 36.75, 36.95, 36.79, 36.69, 36.66, 36.72, 36.85 C. Pulse rate, 56. 



'Benedict and Carpenter, Carnegie Inst. Wash. Pub. No. 123, 1910. 



