SALICYLIC ACID AND SALIC YLATES. 711 



The average daily quantity of nitrogen eliminated by No. 3 in the 

 fore period is 12.941 grains, in the preservative period 13.380 grams, 

 and in the after period 13.939 grams. These data show a slight ten- 

 dency on the part of the preservative to increase the elimination of 

 nitrogen during the administration of the preservative, and this 

 tendency is maintained in the after period, though not in proportion 

 to the great increase in the volume of the urine. The average daily 

 quantity of urea excreted, as determined by the first method of exam- 

 ination, in the fore period is 11.785 grams in the composite sample, 

 in the preservative period 12.099 grams in the composite sample, and 

 in the after period, in the average daily samples, 12.429 grams. Here 

 there is manifested a slight influence on the part of the preservative 

 to increase the total quantity of nitrogen excreted as urea. In respect 

 of the uric acid the average daily amount excreted by No. 3 in the 

 composite sample is 0.191 gram, in the preservative period in the 

 composite sample 0.161 gram, and in the after period in the composite 

 sample 0.202 gram. Here we find again a tendency on the part of 

 the preservative to diminish the quantity of nitrogen eliminated as 

 uric acid. 



In regard to the average daily quantity of urea excreted by No. 3, 

 as determined by the first method, it is found to be 25.227 grams in 

 the composite sample, in the composite sample of the preservative 

 period 25.902 grams, and in the average of the daily Samples of the 

 after period 26.607 grams. The average daily quantity of uric acid 

 excreted by No. 3 in the composite sample of the fore period is 0.571 

 gram, in the composite sample of the preservative period 0.483 gram, 

 and in the composite sample of the after period 0.603 gram. In this 

 case there is an apparent tendency on the part of the preservative to 

 diminish the average daily quantity of uric acid excreted. If, now, 

 we consider the ratio of the uric acid nitrogen to the total nitrogen 

 eliminated, we find that this ratio in the composite sample of the fore 

 period is 67.7, in the composite sample of the preservative period 83.1, 

 and in the composite sample of the after period 69.1. Here there is 

 indicated a very strong tendency on the part of the preservative to 

 increase the ratio of the uric acid excreted to the total nitrogen elimi- 

 nated, and thus to apparently decrease the relative quantities of uric 

 acid nitrogen excreted, a tendency which has been uniform in all three 

 of the present cases. The total percentage of nitrogen of the food 

 excreted in the urine by ^jTo. 3 in the composite sample of the fore 

 period is 77.4, in the composite sample of the preservative period 80, 

 and in the composite sample of the after period 83.4. There is here 

 an apparent tendency on the part of the preservative to increase the 

 percentage of the total nitrogen in the food eliminated in the urine. 

 The total nitrogen in the urine eliminated as urea in the composite 



