SALICYLIC ACID AND SALIC YLATES. 713 



sample of the after period 0.207 gram. Here there is a manifest ten- 

 dency on the part of the preservative to diminish the daily quantity of 

 uric-acid nitrogen excreted. 



When the total quantity of urea excreted is taken into consideration, 

 it is seen that in the composite sample of the fore period it is 26.433 

 grams by the first method of determination; in the composite sample 

 of the preservative period it is 26.074 grams, and in the average of 

 daily samples of the after period 27.055 grams. Here is noted a ten- 

 dency on the part of the preservative to diminish the average daily 

 quantity of urea excreted, and there is an increase in the quantity of 

 urea in the after period. 



The average daily quantity of uric acid excreted in the fore period 

 is 0.601 gram, in the preservative period 0.529 gram, and in the after 

 period 0.620 gram in the composite samples. These data indicate a 

 tendency on the part of the preservative to diminish the total quantity 

 of uric acid excreted. 



The ratio of the uric-acid nitrogen excreted to the total nitrogen 

 eliminated in the fore period, in the composite sample, is 68.3, in the 

 composite sample of the preservative period 75.9, and in the com- 

 posite sample of the after period 67.6. This increase in the ratio 

 shows a corresponding decrease in the relative amount of uric-acid 

 nitrogen excreted in relation to total nitrogen eliminated. 



The average percentage of nitrogen eliminated in the fore period in 

 the composite sample is 85, in the composite sample of the preserv- 

 ative period 83.4, and in the composite sample of the after period 87. 

 There is a slight tendency, therefore, on the part of the preservative 

 to dimmish the average daily percentage of total nitrogen eliminated 

 in the urine. 



The total nitrogen in the urine eliminated as urea in the fore period 

 is 90.2 per cent, in the preservative period 91.4 in the composite 

 sample, respectively, and in the average daily samples of the after 

 period 90.7. There is here, therefore, manifested a tendency on the 

 part of the preservative to increase the relative percentage of nitrogen 

 eliminated as urea, the conclusion being based upon the results 

 obtained by the Morner-Sjoqvist method. 



The percentage of uric acid nitrogen excreted per day in the fore 

 period (based on total nitrogen eliminated) is 1.5, in the preservative 

 period 1.3, and in the after period 1.5, indicating a slight tendency to 

 decrease the relative quantity of nitrogen eliminated as uric acid 

 nitrogen. 



7656 No. 84, pt 206 16 



