710 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 







of daily samples for the after period 25.542 grams. In this case there 

 is a slight tendency on the part of the preservative to increase the 

 average daily amount of urea excreted. The average daily quantity 

 of uric acid excreted by No. 2 in the fore period is 0.503 gram in the 

 composite sample, in the preservative period it is 0.468 gram, and in 

 the after period 0.415 gram. In this case there seems to be a marked 

 tendency to diminish the average daily quantity of uric acid excreted, 

 due to the influence of the preservative, and this tendency is continued 

 in the after period. The ratio of the uric-acid nitrogen to the total 

 nitrogen eliminated in the fore period is 80.2 in the composite sample, 

 in the preservative period ( S7.4, and in the after period in the composite 

 sample 95.5. These data indicate a diminished quantity of uric-acid 

 nitrogen in relation to total nitrogen eliminated under the influence of 

 the preservative, and this tendency is markedly increased in the after 

 period. 



Of the total nitrogen ingested in the food 84.5 per cent is eliminated 

 in the urine by No. 2 in the composite sample of the fore period, in the 

 composite sample of the preservative period 85.7, and in the composite 

 sample of the after period 83.3. These data indicate a slight tendency 

 on the part of the preservative to increase the quantity of nitrogen in 

 the urine under the action of the preservative. The percentage j)f the 

 total nitrogen in the urine excreted as urea during the fore period in 

 the composite sample is 89.2, in the preservative period 91.2 in the 

 composite sample, and in the average of daily samples of the after period 

 89.2. These data show a slight tendency on the part of the preserva- 

 tive to increase the percentage of total nitrogen excreted as urea. The 

 percentage of uric-acid nitrogen excreted in the composite sample in 

 the fore period is 1.2, in the composite sample of the preservative 

 period 1.1, and in the composite sample of the after period 1.0. There 

 is practically no influence, therefore, exerted b}^ the preservative in 

 this case in changing the relative percentage of uric-acid nitrogen 

 excreted. 



No. 3. 



In the case of No. 3 the average daily volume of urine excreted in 

 the fore period is 675 cc; in the preservative period 760 cc, and in the 

 after period 1,114 cc. These data show again a slight tendency on the 

 part of the preservative to increase the volume of urine, which is 

 greatly accentuated on the withdrawal of the preservative in the after 

 period. This phenomenon having occurred in all three cases would 

 indicate a tendency on the part of the salicylic acid to stimulate the 

 secretory organs connected with the elimination of the urine to extra- 

 ordinary activity upon the withdrawal of the salicylic acid. This is 

 an apparent tendency which is worthy of further investigation. 



