BORIC ACID AND BORAX. 129 



SERIES I. 



In Series 1 the summary includes all the members of the table, since 

 they all went through the entire series. 



No. lJ. N. 



Compared by periods, the average daily weight of the wet feces is 

 142.1 grams for the fore period, 134.9 for the preservative period, and 

 148 for the after period. The percentage of water in the feces is almost 

 constant throughout, being 80.86 for the fore period, 79.69 for the 

 preservative period, and 78.11 for the after period. The average daily 

 weight of dry feces is 27.2 grams for the fore period, 27.4 for the pre- 

 servative period, and 32.4 for the after period. The percentage of 

 nitrogen eliminated in the feces is 7.7 for the fore period, 7.1 for the 

 preservative period, and 8.2 for the after period. The percentage of 

 phosphoric acid eliminated in tfre feces is 47.1 for the fore period, 39.3 

 for the preservative period, and 49.4 for the after period. 



The above data show that the preservative has no notable influence 

 upon the percentage of water in the feces, and but little on the total 

 weight of the dry feces, although there is a considerable increase in 

 this respect in the after period. They show, also, a slight tendency 

 on the part of the preservative to decrease the percentage of nitrogen 

 eliminated in the feces, and a marked tendency to decrease the per- 

 centage of phosphoric acid eliminated in the feces. In other words, 

 there is a slight tendency on the part of the preservative to increase 

 the absorption of the nitrogenous and phosphatic elements of the food 

 in passing through the digestive tract. 



No. gF. C. W. 



The data relating to subject No. 2 are given in a similar manner, and 

 it is not necessary to discuss them in detail, but only as to general 

 results. In the case of No. 2 there appears to be a tendency on the 

 part of the preservative to increase the amount of water in the feces. 

 In other words, the feces, according to their chemical composition, are 

 softer than in the fore and after periods, the average percentage of 

 water in the fore period in the feces of No. 2 being 79.65, and in the 

 after period 77.88, while the average amount for the preservative 

 period is 83.91. There is a slight increase also in the total weight of 

 dry feces during the preservative period. The average daily weight 

 of the dry feces in the fore period is 23.2, for the preservative period 

 30.7, and for the after period 29. The percentage of nitrogen elimi- 

 nated in the feces for the fore period is 7.7, for the preservative period 

 9.9, and for the* after period 8.8. The percentage of phosphoric acid 

 eliminated during the fore period is 37.1, for the preservative period 

 35.1, and for the after period 36.6. 

 4242 No. 84, pt 104 9 



