DIGESTIBILITY AND AVAILABILITY OF FOOD. 



215 



DETAILS OF DIGESTION EXPERIMENT NO. 1 94. 



This experiment, a part of metabolism experiment, No. 38, 

 was a work experiment, with an excess of fat in the diet. It 

 began with breakfast January 15, 1901, and continued four 

 days. The subject, J. C. W., weighed in underclothes 74.1 

 kilos at the beginning and 73.5 kilos at the end of the experi- 

 ment. The work consisted of pedalling a stationary bicycle 

 for eight hours each day. 



Table 115. 

 Digestion experivtent JVo. ig^. 



During this experiment the subject eliminated 4033.2 grams 

 urine, containing 81. i grams nitrogen. The average nitrogen 

 balance per day was therefore as follows: Income in food, 16.9 

 grams; outgo in urine and perspiration, 20.6 grams, and in 

 feces, 1.2 grams; implying a loss of 4.9 grams nitrogen, cor- 

 responding to 30.5 grams protein. 



