DIGESTIBILITY AND AVAILABILITY OF FOOD. 



205 



DETAILS OF DIGESTION EXPERIMENT NO. 1 53. 



This experiment, preliminary to metabolism experiment No. 

 29, began with breakfast March 12, 1900, and continued four 

 days. The subject, J. F. S., weighed in underclothes at the. 

 beginning of the experiment 68.9 kilos and at the end 64.5 

 kilos. During the period of the experiment he took a consid- 

 erable amount of muscular exercise each day. The diet con- 

 tained an excess of carbohydrates. 



Table 105. 

 Digestion experinie7it No. i^j. 



During this experiment the subject eliminated 3434.5 grams 

 urine, containing 59.8 grams nitrogen. The average nitrogen 

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

 16.0 grams; outgo in urine, 16.0 grams, and in feces, .9 gram; 

 implying a loss of .9 gram nitrogen, corresponding to 5.6 grams 

 protein. 



