732 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



INDIVIDUAL ANALYTICAL DATA. 



No. 1. 



In the case of No. 1, Table VI, the average daily volume of the 

 urine excreted during the fore period is 921 cc, containing 56.7 grams 

 of solid matter. The total nitrogen ingested daily in the food is 16.46 

 grams, the total nitrogen excreted in the urine 13.81 grams. Of this 

 quantity 12.77 grams are present as urea, 0.15 as uric acid, 0.04 as 

 xanthin, 0.42 gram as kreatinin, 0.22 gram as ammonia, and 0.22 

 gram undetermined. 



During the preservative period there was a slight increase in the 

 volume of the urine and a considerable increase in the amount of total 

 solids therein. There was an increase in the amount of urea, a slight 

 increase in the amount of kreatinin and ammonia excreted, and a slight 

 decrease in the amount of uric acid found, leaving a total of only 0.18 

 gram daily of nitrogen unaccounted for by a direct determination of 

 the various nitrogenous constituents. 



In the after period there was again an increase in the quantity of 

 the urine, a decrease in the amount of total solids to practically the 

 same figure as in the fore period, and a decrease in the quantity of 

 nitrogen in the urine and the amount of urea excreted. 



In respect of the quantity of materials eliminated, it is seen that the 

 average excretion per day of total urea is 27.33 grams in the fore 

 period, for uric acid 0.45 gram, for xanthin 0.10 gram, for kreatinin 

 1.13 grams, and for ammonia 0.27 gram for the fore period. 



In the preservative period the quantity of urea daily excreted is 

 almost exactly 1 gram greater than in the fore period. The quantity 

 of kreatinin is also somewhat increased. 



In the after period the several amounts excreted are almost the 

 same as in the fore period. In the case of No. 1, therefore, it is 

 apparent that the effect of the salicylic acid was to increase the quan- 

 tity of urea and kreatinin excreted, but not to increase the quantity 

 of uric acid and the other nitrogenous constituents. The percentage 

 of nitrogen excreted in the urine, computed upon the total quantity 

 of nitrogen in the foods in the case of No. 1 in the fore period, is 83.9. 

 The percentages of the various nitrogenous constituents in the urine 

 (based on the total nitrogen excreted) are urea 92.5, uric acid 1.1, 

 xanthin 0.3, kreatinin 3, ammonia 1.6, and undetermined 1.5. 



In the preservative period the percentage of nitrogen in the food 

 excreted in the urine is very markedly increased. The percentage in 

 the urine in the various forms of nitrogenous constituents does not 

 differ greatly from the fore period, except in the cases of kreatinin 

 and ammonia, where there is a considerable increase and the 

 percentage of undetermined is less. 



