916 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



already discussed is the increase in the excretion of metabolized phos- 

 phorus in the preservative period. 



The quantity of phosphoric acid ingested in the food of No. 1-0 is 

 almost the same for all periods. The quantity of phosphoric acid 

 excreted in the feces is notably increased in the preservative period 

 and still more so in the after period. The quantity occurring in the 

 urine is diminished in the preservative period and restored, but not 

 quite to the original quantity, in the after period. The total quantity 

 of phosphoric acid excreted is slightly diminished in the preservative 

 period and considerably increased in the after period. The balance 

 is positive and quite large, amounting to 0.817 gram in the fore 

 period, 0.845 gram in the preservative period, and 0.548 gram in the 

 after period. The influence of the preservative appears to have been 

 to decrease decidedly the absorption of the phosphorus. The phos- 

 phoric acid eliminated in the urine was greatly decreased in the pre- 

 servative period over the amount eliminated in the fore period, while 

 the reverse is true of the phosphoric acid eliminated in the feces. In 

 the after period there is a tendency to return to the conditions of the 

 fore period with respect to the urine, but the amount excreted in the 

 feces was still further increased. 



The quantity of phosphoric acid exhibited in the food in the case 

 of No. 11 is almost the same in the three periods. There is a notable 

 increase in the amount excreted in the feces during the preservative 

 period and a decrease in the after period to an amount less than in 

 the fore period. In respect of the urine, there is a marked decrease 

 in the quantity excreted during the preservative period and a slight 

 gain over this quantity in the after period. In regard to the total 

 phosphoric acid excreted, it is seen that it is slightly less in the pre- 

 servative period than in the fore period, and is still further dimin- 

 ished in the after period. The balance is very large in all cases, 

 amounting to 0.737 gram in the fore period, 0.887 gram in the pre- 

 servative period, and 1.272 grams in the after period. 



No. 12 received about the same quantity of phosphoric acid in 

 all three periods. There is a slight increase in the amount excreted 

 in the feces in the preservative period and a very marked decrease 

 in the amount excreted in the after period. In the urine there is also 

 an increase in quantity in phosphoric acid excreted, and the amount 

 excreted in the after period is almost the same as that in the pre- 

 servative period. The balance in this case is positive and amounts 

 to 0.184 gram in the fore period, 0.116 gram in the preservative 

 period, and 0.144 gram in the after period. These data show a slight 

 tendency on the part of the preservative to increase the metabolism 

 of phosphoric acid. 



