DIGESTIBILITY AND AVAILABILITY OF FOOD. 



207 



DETAILS OF DIGESTION EXPERIMENT NO. 1 56. 



This experiment, which was a part of metabolism experi- 

 ment No. 31, began with breakfast March 22, 1900, and con- 

 tinued three days. The diet contained an excess of fat. The 

 subject, J. F. S., weighed 64.1 kilos at the beginning and 64.5 

 kilos at the end of the experiment. During the experiment 

 he was engaged eight hours each day at work upon the station- 

 ary bicycle. 



Table 107. 

 Digestio7i experimeiit No. 1^6. 



During this experiment the subject eliminated 2482.8 grams 

 urine, containing 46.3 grams nitrogen. The average nitrogen 

 balance per day was therefore as follows: Income in food, 

 16. 1 grams; outgo in urine and perspiration, 15.6 grams, and 

 in feces, .8 gram; implying a loss of .3 gram nitrogen, corre- 

 sponding to 2.3 grams protein. 



