682 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



variation in the total quantity of solids, the amounts being as nearly 

 alike as can be secured when a varied ration of uncomminuted food is 

 used. Of this quantity there appear in the feces 14 grams daily in the 

 fore period, 13 grams daily in the preservative period, and 19 grams 

 daily in the after period. In the urine there are found 58 grams daily 

 in the fore period, 62 grams in the preservative period, and 63 grams in 

 the after period. Expressed in percentages, of the total quantity of 

 solids it is found that 3 per cent appear in the feces in the fore period, 

 2.66 per cent in the preservative period, and 4.08 per cent in the after 

 period. The respective percentages occurring in the urine are 12.32 

 in the fore period, 13.12 in the preservative period, and 13.28 in the 

 after period. Inasmuch as by far the greater quantity of solid matter 

 in the food is consumed in the production of heat and energy, the 

 balance must be strongly positive. In this case the daily balance for 

 the fore period is 395 grams, for the preservative period 399 grams, 

 and for the after period 393 grams, showing very little difference in 

 respect of the quantity of solids excreted. It is noticed that there is 

 a slightly smaller quantity of solids in the feces in the preservative 

 period than during either the fore or after period; a slightly greater 

 quantity in the urine during the preservative period than in the fore 

 period and a somewhat greater quantity during the after period. 

 The percentage numbers show the same tendency as the weights, the 

 smallest percentage of solids in the feces being in the preservative 

 period and the largest in the after period. The effect of the pre- 

 servative in this case appears to have been to secure a slightly greater 

 degree of absorption during the preservative period than in the fore 

 period, and on the withdrawal of the preservative the absorption of 

 the food was much less complete. 



No. 2. 



A much larger quantity of solid food was consumed by No. 2 than 

 by No. 1. In the fore period the exact daily quantity of dry food 

 consumed is 604 grams, in the preservative period 598 grams, and in 

 the after period 612 grams. There appear in the feces for the fore 

 period 27 grams of solids, during the preservative period 24 grams, 

 and during the after period 22 grams. In the urine are found 66 

 grams of solids daily in the fore period, 67 grams in the preservative 

 period, and 69 grams in the after period. Expressed in percentages, 

 the quantity in the feces in the fore period is 4.47 per cent, in the 

 preservative period 3.95 per cent, and in the after period 3.52 per cent. 

 The percentages occurring in the urine during these periods are 10.88 

 in the fore period, 11.22 in the preservative period, and 11.30 in the 

 after period. The balances are 511 grams, 507 grams, and 521 grams 

 for the three periods, respectively. 



