DIGESTIBILITY AND AVAILABILITY OF FOOD. 



233 



DETAILS OF DIGESTION EXPERIMENT NO. 308. 



This experiment which forms a part of both metabolism ex- 

 periments 54 and 55, began with breakfast April 27, 1902, and 

 continued four days. These were both work experiments with 

 an excess of fat in the diet, but No. 55 comprised one day of 

 work that was much harder than usual, and continued at least 

 twice as long. The weight of the subject, J. C. W., in under- 

 clothes was 80.2 kilos at the beginning and 76.4 kilos at the 

 end of the experiments. 



Table 133. 

 Digestion experiment No. jo8. 



During this experiment the subject eliminated 7633.1 grams 

 urine, containing 67.2 grams nitrogen. The average nitrogen 

 balance per day was therefore as follows: Income in food, 18.3 

 grams; outgo in urine and perspiration, 17.4 grams, and in 

 feces, 1.7 grams; implying a loss of .8 gram nitrogen, corre- 

 sponding to 5.0 grams protein. 



The results of the digestion experiments are summarized in 

 the followinor table. 



