48 



Table 31. — Results of digestion experiment No. 322 — Continued. 



Sample 

 No. 



Coefficients of digestibility of 



total food 



Estimated coefficients of digest- 

 ibility of bread 



Proportion of energy actually 

 available to body: 



In total food 



In bread alone 



Weight 



of 

 material. 



Protein. 



Per cent. Per cent. 

 I 89. 7 



SO.l 



Fat. 



Carbo- 

 hydrates. 



Ash. 



Per cent. 

 90.2 



7.0 



Per cent. 

 91.6 



89.5 



Per cent. 

 53.1 



Heat of 

 combus- 

 tion. 



Per cent. 

 90.5 



84.9 



86.3 

 81.7 



During this experiment the subject eliminated 4,532 grams urine, 

 containing 52.57 grams nitrogen. The total nitrogen balance per day 

 was therefore as follows: Income in food, 27.94 grams; outgo in urine, 

 13.14 grams, and in feces, 2.76 grams, implying a gain of 12.04 grams 

 nitrogen, corresponding to 75.2 grams protein. 



DIGESTION EXPERIMENT NO. 323. 



Kind of food. — Milk, and bread made from graham flour. 



Subject. — Man No. 3, as in experiment No. 311. 



Weight. — At the beginning of the experiment, 151.25 pounds; at 

 the close, 150.5 pounds. 



Duration. — Four days, with twelve meals, beginning with breakfast 

 May 16, 1902. 



Table 32. — Results of digestion experiment No. 323. 



During this experiment the subject eliminated 4,509 grams urine, 

 containing So. 16 grams nitrogen. The total nitrogen balance per day 

 was therefore as follows: Income in food, 27.42 grams; outgo in 



