612 INFLUENCE OF FOOD PEESERVATIVES ON HEALTH. 



more strongly positive balance, the magnitude of which is 0.666 gram 

 per day. Again, we see in this instance a tendency on the part of 

 the preservative to increase the absorption of the phosphoric acid 

 from the alimentary canal. The quantity of phosphoric acid metabo- 

 lized which was excreted through the kidneys is, however, very greatly 

 reduced, the percentage falling from 65.46 in the fore period to 54.25 

 in the preservative period. It is this great reduction in the metabo- 

 lized phosphoric acid which has caused the balance to be so large. 

 Again, in the after period the marked diminution of the metabolic 

 activity as manifested through the kidneys has caused the balance to 

 become even more strongly positive than during the preservative 

 period, amounting to 0.666 gram per day, although the excretion of 

 nonmetabolized phosphoric acid increased. 



No. 12. 



No. 12 consumed in his food during the fore period 4.434 grams 

 per day, of which 1.549 grams appear in the feces and 2.569 grams 

 in the urine. These data correspond to 34.93 and 57.93 per cent, 

 respectively, of the total quantity of phosphoric acid in the food. 

 During the preservative period No. 12 consumed 4.517 grams of 

 phosphoric acid, of which 1.279 grams appear in the feces and 2.576 

 grams in the urine, corresponding to 28.31 and 57.05 per cent, 

 respectively, of the total phosphoric acid contained in the food. This 

 causes a very large positive balance, the magnitude of which is 0.662 

 gram daily. In the after period No. 12 consumes 4.366 grams of 

 phosphoric acid per day, of which 1.507 grams appear in the feces 

 and 2.456 grams in the urine, corresponding to 34.51 and 56.27 per- 

 cent, respectively, of the total quantity of phosphoric acid in the food. 

 The balance is positive and amounts to 0.403 gram per day. 



Again, we see in this case a tendency on the part of the preservative 

 to increase the absorption of phosphoric acid from the intestinal canal. 

 There is a very slight increase during the preservative period in the 

 quantity of phosphoric acid excreted by the kidneys, but a decrease 

 in the percentage amount and a decided decrease in the nonmetabolized 

 phosphoric acid excreted. During the after period there is an increase 

 in the nonmetabolized phosphoric acid excreted in the feces and a 

 slight falling off of the quantity of phosphoric acid excreted in the 

 urine. In this case the large positive balance of the preservative period 

 is due chiefly to the diminution of the quantity of nonmetabolized 

 phosphoric acid excreted in the feces. 



S! MMARY. 



In the general summary of Table XV (p. 626), the figures for Nos. 

 3, 9, and 10 are omitted for the reasons already given (pp. 585, 587), 

 although presented in detail among the individual data. The follow- 





