BORIC ACID AKD BORAX. 155 



is the highest in No. 6, reaching 88.3 per cent, and lowest in No. 3, 

 falling to 68.7 per cent. The mean percentage eliminated for the six 

 subjects is 78.8 per cent. 



During the preservative period the total quantity of nitrogen appear- 

 ing in the urine is 1,068.77 grams, a daily average of 14.06 grams per 

 man. The nitrogen in the corresponding food is 1,299.56 grams, an 

 average of 17.10 grams per man. The percentage eliminated, as in the 

 first instance, varies with the different subjects, the highest being in the 

 case of No. 6, namely, 93.6 per cent, and the lowest in the case of 

 No. 5, namely, 76.4 per cent. The mean percentage eliminated is 82.2 

 per cent. 



In the after period the total quantity of nitrogen found in the urine 

 is 808.35 grams, an average of 13.7 grams per day for each individual. 

 The percentage of nitrogen eliminated in the urine varies widely with 

 the different individuals. The highest percentage was in the case of 

 No. 4, namely, 82.8 per cent, and the lowest in No. 3, namely, 75.1 

 -per cent. The mean percentage is 80.3. 



The above data indicate that the administration of the preservative 

 slightly increased the quantity of nitrogen excreted by the urine. 



PHOSPHORIC ACID. 



The quantity of phosphoric acid which appears in the urine during 

 the fore period is 92.579 grams, amounting to 2.572 grams a day for 

 each individual. The phosphoric acid in the corresponding food is 

 147.158 grams, a daily average of 4.088 grams for each man. The 

 highest percentage eliminated is found in the case of No. 6, namely, 

 78.1, and the lowest in the case of No. 1, namely, 52.3. The mean 

 percentage of phosphoric acid eliminated in the urine is 62.9. 



In the preservative period 194.378 grams of phosphoric acid appear 

 in the urine, equivalent to 2.49 grams a day for each man. The phos- 

 phoric acid in the corresponding food is 299.393 grams, or 3.838 grams 

 a day for each man. The largest percentage of phosphoric acid was 

 excreted in the case of No. 4, namely, 73.9, and the smallest in the 

 case of No. 5, namel} 7 , 57.5. The mean percentage of phosphoric acid 

 excreted in the urine for the preservative period is 64.9. 



The quantity of phosphoric acid appearing in the urine during the 

 after period is 145.751 grams, equivalent to 2.429 grams per day for 

 each individual. Corresponding to this quantity there are 229.25 

 grams in the food, equivalent to 3.82 grams per day for each person. 

 The largest percentage of phosphoric acid excreted was in the case of 

 No. 6, namely, 76.2 per cent, and the smallest percentage is found in 

 the case of No. 1, namely, 51.9 per cent. The mean percentage 

 excreted is 63.6. The above data show a very slight influence on the 

 part of the preservative to increase the excretion of phosphoric acid. 



