DIGESTIBILITY AND AVAILABILITY OF FOOD. 



211 



DETAILS OF DIGESTION EXPERIMENT NO. 1 89. 



This experiment, preliminary to metabolism experiment No. 

 35, began with breakfast December 5, 1900, and continued 

 four days, with an ordinary mixed diet. The subject, J. C. W. , 

 was a college student. His weight was not taken at the be- 

 ginning of the experiment but at the end it w^as 76.1 kilos. 

 During the experiment he took as little muscular exercise as 

 practicable. 



Table hi. 

 Digestion experiment No. i8g. 



During this experiment the subject eliminated 3154.8 grams 

 urine, containing 63.7 grams nitrogen. The average nitrogen 

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

 15.6 grams; outgo in urine, 15.9 grams, and in feces, i.i 

 grams; implying a loss of 1.4 grams nitrogen, corresponding to 

 8.7 grams protein. 



