584 INFLUENCE OF FOOD PEESERVATIVES ON HEALTH. 



No. 1. 



The total nitrogen exhibited in the food of No. 1 in the fore period 

 is 147.56 grams, an average of 14.76 grams per day. Of this nitrogen 

 4.66 per cent is excreted in the feces and 86.62 per cent in the urine, 

 and the total excreted in the feces and urine is 91.28 per cent. The 

 average daily balance during the period is +1.29 grams. 



For the whole preservative period the total quantity of nitrogen 

 exhibited in the food is 436.16 grams, an average daily quantity of 

 14.54 grams. Of this quantity 18.42 grams are excreted in the feces 

 and 418.98 grams in the urine; 4.22 per cent of the total amount 

 excreted is found in the feces and 96.06 per cent in the urine. The 

 nitrogen balance becomes a negative quantity, 0.04 gram per day. 

 During the after period the quantity of nitrogen given in the food is 

 146.08 grams, or 14.61 grams per day. Of this quantity 6.31 percent 

 of nitrogen is excreted in the feces and 96.16 per cent in the urine, 

 again showing a balance of 0.36 gram per day. In the case of No. 1 

 it is evident that the effect of the administration of the salicylic acid 

 was to increase the metabolism of nitrogen. Not only was the quan- 

 tity excreted in the feces diminished during the preservative period, 

 but the quantity excreted in the urine was very greatly increased. 

 During the after period the quantity of nonmetabolized nitrogen, that 

 is, that appearing in the feces, was very largely increased, and the 

 quantity of nitrogen in the urine was slightly increased. In the case 

 of No. 1, therefore, a distinct influence is manifested on the part of 

 the preservative to increase the output of nitrogen, especially of the 

 metabolized nitrogen. 



No. 2. 



The total quantity of nitrogen exhibited during the fore period in 

 the case of No. 2 is 164.70 grams, an average of 16.47 grams per day; 

 10.29 per cent of the nitrogen appeared in the feces and 95.76 per 

 cent in the urine. The nitrogen balance is 1 gram per day, which 

 represents an abnormal condition due to some cause not revealed in 

 the analytical data. During the preservative period the total quantity 

 of nitrogen exhibited in the food is 492.85 grams, with a daily average 

 of 16.43 grams. The percentage of nitrogen excreted in the feces is 

 8.92; in the urine, 91.65, and the nitrogen balance is a negative quan- 

 tity of 0.09. During the after period the total quantity of nitrogen 

 exhibited in the food is 164.84 grams, with a daily average of 16.48 

 grams; 8.04 per cent of nitrogen is excreted in the feces and 95.78 

 per cent in the urine. The nitrogen balance is ag in a negative quan- 

 tity, equivalent to 0.64 gram per day. The data in the case of No. 

 2, as in the case of No. 1, show the influence of the preservative in 

 increasing the excretion of nitrogen, if we exclude from consideration 



