BOKIC ACID AND BOEAX. 131 



inated in the feces in the fore period is 10, in the preservative period 

 11, and in the after period 10.6. There is an apparent tendency of 

 the preservative in this case to diminish the percentage of the nitrog- 

 enous elements of the food absorbed from the alimentary canal. The 

 percentage of phosphoric acid eliminated in the feces during the fore 

 period is 35.7, during the preservative period 37.2, and during the 

 after period 30.9. In this case there is an apparent tendency of the 

 preservative to diminish the amount of the phosphatic elements of the 

 food absorbed from the alimentary canal. 



No. 6L. M. S. 



In this instance there seems to be no tendency on the part of the 

 preservative to increase the amount of water in the feces, the percent- 

 age for the fore period being 82.97, for the preservative period 81.66, 

 and for the after period 79.86. The percentage of nitrogen eliminated 

 in the feces in the fore period is 12.9, in the preservative period 13.9, 

 and in the after period 11.6. In this subject there is an apparent 

 tendency on the part of the preservative to diminish the absorption of 

 the nitrogenous elements of the food from the alimentary canal. The 

 percentage .of phosphoric acid eliminated in the feces in the fore 

 period is 27.2, in the preservative period 35.4, and in the after period 

 32.7. There is in this case a manifest tendency on the part of the 

 preservative to diminish the absorption of the phosphatic elements of 

 the foods during their passage through the alimentary canal. 



SUMMARY. 



In general there is a marked difference manifest in the six subjects in 

 regard to the degree of absorption. The balances of Series I may be 

 summarized in round numbers as follows: In the case of No. 1 almost 

 half of the phosphoric acid entering the food is eliminated in the feces, 

 and from 6 to 8 per cent of the total nitrogen exhibited in the food is 

 recovered in the feces. In the case of No. 2 about 35 per cent of the 

 phosphoric acid is recovered in the feces, and about 9 per cent of the 

 nitrogen. In No. 3 about 28 per cent of the total phosphoric acid in 

 the food is recovered in the feces, and about 8 per cent of the nitrogen. 

 In the case of No. 4 about 30 per cent of the phosphoric acid exhibited 

 in the food is recovered in the feces, and about 8 percent of the nitro- 

 gen. In the case of No. 5 about 36 per cent of the phosphoric acid 

 exhibited in the food is recovered in the feces and about 11 per cent 

 of the nitrogen. In No. 6 bout 33 per cent of the phosphoric acid 

 exhibited in the food is recovered in the feces and 13 per cent of the 

 nitrogen. 



Combining all of the average data obtained from the six subjects 

 into one expression, the following general data are obtained: The aver- 

 age daily weight of the moist feces per man in the fore period is 125.6 



