BORIC ACID AND BORAX. 147 



appear in the feces in the fore period, 4.3 per cent in the preservative 

 period, and 6 per cent in the after period. 



The data in this case are of little value in judging of the effect of 

 the preservative upon the percentage of the food elements eliminated 

 during the preservative period as compared with the fore period, 

 since the rate of increase is found in each case to be larger in the 

 after period, and this increase is not explicable on any ground in con- 

 nection with the administration of the preservative itself. So far as 

 the quantity of food is concerned, as measured by its elements, we 

 find that during the fore period the average daily quantity of nitrogen 

 consumed is 17.43 grams, during the preservative period 18.69 grams, 

 and during the after period 18.58 grams. Of phosphoric acid, 4.74 

 grams was consumed in the fore period, 4.82 grams in the preserva- 

 tive period, and 5.04 grams in the after period. Of fat, we find the 

 daily amount consumed in the fore period is 121.43 grams, in the pre- 

 servative period 124.7 grams, and in the after period 128.56 grams. 

 The calorific value of the food during the fore period, daily, is 3,472 

 units, during the preservative period 3,438 units, and during the after 

 period 3,378 units. Thus it does not appear that the increased elimi- 

 nation of the food elements, so marked during the after period, could 

 have been due to any corresponding increase in the quantity of food 



consumed. 



No. 2F. C. W. 



The percentage of moisture in the feces of No. 2 during the fore 

 period is 79.18, during the preservative period 78.75, and during the 

 after period 76.39. There appears to be no tendency in this case on 

 the part of the preservative to increase the quantity of moisture in the 

 feces, although they become much dryer when the preservative is 

 withdrawn. The total quantity of dry substance in the feces during 

 the fore period is 22.4 grams, during the preservative period 25.1 

 grams, and during the after period 31.4 grams. The percentage of 

 nitrogen in the food eliminated during the fore period is 6.1, during 

 the preservative period 8.3, and during the after period 8.4. There 

 seems in this case to be a tendency on the part of the preservative to 

 diminish the percentage of the nitrogenous elements of the food 

 absorbed. Of the phosphoric acid in the food, 33.8 per cent is elimi-' 

 nated in the feces during the fore period, 40.3 per cent in the pre- 

 servative period, and 46.4 per cent in the after period. There is an 

 apparent tendency in this case on the part of the preservative to 

 diminish the absorption of 'phosphoric acid, and this tendency con- 

 tinues, and even increases, during the after period. Of the fat in the 

 food, 2.1 per cent is eliminated in the feces in the fore period, 2.8 

 per cent in the preservative period, and 4.1 per cent in the after period. 

 In this case, also, there seems to be a tendency on the part of the pre- 

 servative to diminish the percentage of fat absorbed, and this tendency 



