1028 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



period and also the percentage of nitrogen excreted as ammonia. 

 The nitrogen excreted as kreatinin is slightly less in the preservative 

 period than in either the fore or after periods. 



SUMMARIES. 



Summaries are given for Nos. 3 and 4, and for 3, 4, and 10, but 

 only the latter is discussed, as the two show the same general ten- 

 dencies throughout. 



The volume of the urine is slightly less in the preservative period 

 than in the fore period, while it is considerably increased over the 

 fore period in the after period, due to the large increase in the case 

 of No. 10. There is no indication in this case, therefore, of any 

 diuretic property of the preservative. The total solids in the urine 

 are slightly increased during the preservative period, and this increase 

 is repeated in the after period. The total nitrogen in the urine is 

 slightly decreased in the preservative period, but there is a tendency 

 shown in the after period to restore the amount to that of the fore 

 period. The quantity of urea excreted during the preservative 

 period is less than during the fore period, and there is a tendency 

 shown during the after period to increase the quantity to that of the 

 fore period. The excretion of uric acid does not seem to be appre- 

 ciably affected by the exhibition of the preservative. There appears 

 to be no notable effect produced upon the excretion of xanthin under 

 the influence of the preservative. In respect of kreatinin there is a 

 slight increase in the quantity excreted in the preservative period. 

 The excretion of ammonia is not greatly affected by the exhibition 

 of the preservative, but there is a tendency shown to a diminished 

 excretion. 



The percentage of nitrogen excreted in the urine of the total 

 ingested nitrogen is considerably diminished during the preservative 

 period and is not fully restored in the after period. The percentage 

 of nitrogen excreted as urea is slightly diminished in the preservative 

 period, but is increased in the after period to a larger percentage 

 than in the fore period. The percentage of nitrogen excreted as 

 uric acid is practically the same in the preservative and after periods. 

 The percentage of nitrogen excreted as xanthin is less in the pre- 

 servative period and is decidedly less in the after period. The per- 

 centage of nitrogen excreted as kreatinin is notably increased in the 

 preservative period, while it is almost the same in the after period 

 as in the fore period. The percentage of nitrogen excreted as am- 

 monia is decreased in the preservative period and increased in the 

 after period to a slightly greater amount than in the fore period. 



A summary of the data shows quite unmistakably a tendency on 

 the part of the added preservative to diminish the percentage of urea 

 nitrogen excreted. This diminution is shown to a less extent in all 

 of the nitrogenous constituents of the urine except kreatinin, which 

 slightly increases. 



