610 INFLUENCE OF FOOD PKESEKVATIVES ON HEALTH. 



daily, of which 0.942 gram appears in the feces and 1.744 grams in 

 the urine, equivalent to 31.81 and 58.87 per cent, respectively, of the 

 total quantity of phosphoric acid ingested. The balance now becomes 

 positive and its magnitude is equivalent to 0.276 gram of phosphoric 

 acid per day. During the after period the quantity of phosphoric acid 

 consumed daily by No. 8 is 2.9 grams, of which 1.131 grams appear 

 in the feces and 1.5.33 grams in the urine, corresponding to 39 and 

 52.84 per cent, respectively, of the total quantity of phosphoric acid in 

 the food. The balance is again positive, amounting to 0.236 gram per 

 day. These data again show a tendency on the part of the preservative 

 to increase the absorption of the phosphoric acid from the alimentary 

 canal, but there is no evidence of any increased katabolic activity 

 given by the urinary sis. On the contrary, the quantity so excreted is 

 slightly smaller in amount and considerabty smaller in percentage than 

 during the fore period. 



In the after period the quantity of nonmetabolized phosphoric acid 

 excreted becomes considerably greater, but the quantity of metabolized 

 phosphoric acid is decidedly less and the balance is slightly decreased. 



The daily quantity of phosphoric acid consumed in the food by No. 9 

 during the fore period amounts to 4.832 grams, of which 1.014 grams 

 appear in the feces and 2.227 grams in the urine. These data corre- 

 spond to 20.99 and 46.08 per cent, respectively, of the total phos- 

 phoric acid in the food. The balance for the fore period is positive, 

 amounting to 1.591 grams per day. 



During the preservative period the quantity of phosphoric acid 

 daily consumed is increased, amounting to 5.012 grams per day, of 

 which 1.635 grams occur in the feces and 2.457 grams in the urine. 

 These data correspond to 32.62 and 49.01 per cent, respectively, of 

 the amount of phosphoric acid in the food. The balance for the pre- 

 servative period is again positive, though not so great in amount as 

 that of the fore period, amounting to only 0.920 gram per day. 



During the after period No. 9 consumed 5.111 grams of phosphoric 

 acid daily, of which 1.429 grams appear in the feces and 2.295 grams 

 in the urine, corresponding to 27.96 and 44.91 per cent, respectively, 

 of the phosphoric acid in the food. The balance is again strongly 

 positive, amounting to 1.387 grams per day. 



According to these data the amount of both metabolized and non- 

 metabolized phosphoric acid eliminated by this subject during the 

 preservative period was greater than in the fore period. The increase 

 of the nonmetabolized phosphoric acid is especially marked. During 

 the after period the amount of metabolized phosphoric acid eliminated 

 is not greatly different from that of the fore period, although it is 

 relatively less considering the fact that the amount of phosphoric acid 



