978 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



in the total quantity of calories remaining in the feces and urine. 

 These data show practically no effect upon the utilization of calories 

 produced by the administration of the preservative. 



The data for No. 9 show a slight increase in the calories in the feces 

 and urine in the preservative period, and this is still more marked in 

 the after period. In this case it is probable that the administration 

 of the preservative tends to increase the calories in the feces, and thus 

 to diminish the heat and energy which the heat units of the food 

 should have furnished. 



The quantity of calories in the food of No. 10 are quite constant 

 throughout the whole period . of observation. The total quantity 

 appearing in the feces and urine is increased during the preservative 

 period and still further increased* in the after period. These data 

 indicate a slight disposition on the part of the added preservative to 

 decrease the utilization of the heat-forming elements of the food. 



The food of No. 11 contained a large number of calories, which is 

 quite constant for the three periods. There is only a slight variation 

 in the number of calories excreted in the feces and urine. Apparently 

 in this case there is no influence produced by the administration of 

 the preservative in so far as the utilization of the calories is concerned. 



In the case of No. 12 there is a notable decrease in the calories 

 administered during the after period. This doubtless accounts in a 

 satisfactory way for the decrease in the number of calories in the 

 feces and urine. It is fair to conclude, therefore, from these data that 

 there is no marked influence upon the utilization of the heat-producing 

 elements of the food due to the administration of the preservative. 



SUMMARIES. 



Comparing the summaries of Nos. 1 to 6 and Nos. 8 to 11, inclusive, 

 we find that the average number of calories in the food of Nos. 1 to 6 

 is 3,224 in the fore period, 3,195 in the preservative period, and 3,171 

 in the after period. The total number of calories appearing in the 

 feces and urine is 195 for the fore period, 203 for the preservative 

 period, and 185 for the after period. This, in connection with the 

 small decrease in the number of calories in the food in the preservative 

 period, indicates a slight tendency on the part of the preservative in 

 these six cases to diminish the absorption of the food, which is in 

 harmony with the conclusions drawn from the other balances. < 



In the summary for Nos. 8 to 11, inclusive, the number of calories 

 in the fore period is 3,245, in the preservative period 3,259, and in the 

 after period 3,254, numbers which are, for all practical purposes, identi- 

 cal. The number of calories appearing in the feces and urine in the 

 fore period is 184, in the preservative period 194, and in the after 

 period 208. In this case there appears to be a very slight tendency 



