69 



was therefore as follows: Income in food 22.93 grams; outgo in urine 

 19.97 grams; and in feces 1.26 grams; impking a gain of 1.70 grams 

 nitrogen, corresponding to 10.6 grams protein. 



DIGESTION EXPERIMENT NO. 498. 



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



Subject. — Man No. 3. Conditions as in experiment No. 495. 



Weight. — At the beginning of the experiment 140.5 pounds; at the 

 clo.^^e 138.5 pounds. 



Duration. — Four days, with twelve meals, beginning with tn-eakfast 

 June 15, 1904. 



Table 52. — Results of digestion experiment No. 498. 



During this experiment the subject eliminated 6,655 grams urine, 

 containing 69.21 grams nitrogen. The average nitrogen balance per 

 day was therefore as follows: Income in food 16.92 grams; outgo in 

 urine 17.30 grams; and in feces 1.62 grams; implying a loss of 2 

 grams nitrogen, corresponding to 12.5 grams protein. 



EXPERIMENTS WITH MACARONI. 

 DIGESTION EXPERIMENT NO. 592. 



Kind of food. — INIacaroni and milk. 



Suhject. — Man No. 1. College student 27 years old, engaged part of 

 the time at light work. 



- Weight. — At the beginning of the experiment 150 pounds; at the 

 close 150i pounds. 



Duration. — Four da3's, with twelve meals, beginning with breakfast 

 February 21, 1905. 



