586 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



No. 5. 



During the fore period the quantity of nitrogen exhibited in the 

 food of No. 5 is 158.70 grams, amounting to 15.87 grams per day. 

 Of this quantity, 8.90 per cent is excreted in the feces and 82.79 per 

 cent in the urine. The nitrogen balance is strongly positive, amount- 

 ing to 1.32 grams per day. During the preservative period the total 

 quantity of nitrogen exhibited in the food is 475.86 grams, amounting 

 to 15.86 grams per day. The percentage excreted in the feces is 7.32 

 and in the urine 87.48. The nitrogen balance remains positive, but is 

 diminished in magnitude. The effect of the preservative in this case 

 is to diminish the percentage of nonmetabolized nitrogen and increase 

 very considerably that of the metabolized. In the after period the 

 amount of nitrogen exhibited in the food is 159.30 grams, equivalent 

 to 15.93 grams per day. The percentage excreted in the feces is 6.35 

 and in the urine 87.87. The nitrogen balance is positive and its aver- 

 age magnitude is 0.92 gram per day. The excretion of the nitrogen 

 in the feces is diminished and slightly increased in the urine. The 

 balance indicates a partial return in the after period to the conditions 

 obtaining in the fore period, but a larger percentage of the nitrogen 

 is metabolized, thus continuing the tendency shown in the preservative 

 period. 



No. 6. 



The quantity of nitrogen in the food of No. 6 in the fore period is 

 142.30 grams, equivalent to 14.23 grams per day, of which 10.96 per 

 cent is excreted in the feces and 82.30 in the urine. The nitrogen 

 balance is positive, and has an average daily magnitude of 0.96 gram. 

 During the preservative period the total quantity of nitrogen exhibited 

 in the food is 432.39 grams, equivalent to a daily amount of 14.41 

 grams; 10.73 per cent of this nitrogen is excreted in the feces, 

 and 93.94 in the urine. The nitrogen balance is diminished and 

 becomes a negative quantity equivalent to 0.68 gram per day. The 

 total quantity of nitrogen exhibited in the after period is 143.96 

 grams, showing an average daily quantity of 14.40 grams; 10.43 per 

 cent is excreted in the feces and 84.07 per cent in the urine. The 

 average balance now returns to a positive quantity with an average 

 value of 0. 80 gram. 



These data show a most marked effect of the preservative in increas- 

 ing the excretion of metabolized nitrogen, although the nonmetabolized 

 nitrogen in the feces decreased only very slightly. There is also 

 shown a distinct tendency to return to normal conditions in the after 

 period. In connection with this case it is to be observed that the sub- 

 ject suffered a very marked loss in weight, amounting to more than a 

 kilogram, both in the preservative and after period. 





