20 



THE EFFECT OF THE PRESERVATIVE UPON THE METABOLISM OF 

 PHOSPHORIC ACID. 



A study of the data relative to the influence of boric acid and borax 

 upon the metabolism of phosphorus reveals many contradictory results. 

 When, however, all the data are collected into one expression it is 

 found that the influence of these bodies added to the food is distinctly 

 marked on the metabolism of phosphorus and phosphoric acid. There 

 is a distinct tendency shown by them to increase the quantity of phos- 

 phoric acid excreted during the period of the administration of the pre- 

 servative. In the combined data of Series I, III, IV, and V the aver- 

 age per cent of phosphoric acid, taken in the food, eliminated during 

 the fore periods of observation is 97.3, during the preservative periods 

 103.1 per cent, and during the after periods 97.0 per cent. 



INFLUENCE OF THE PRESERVATIVE UPON THE ELIMINATION OF FAT. 



The influence of boric acid and borax upon the metabolism of fat iaj 

 not very marked. There is a slight tendency shown to decrease the 

 elimination of fat in the feces during the administration of the presenm 

 ative, and a tendency to recover is shown during the after periods. The! 

 percentage of fat ingested in the food, eliminated during the fore periods 

 is 4.1, during the preservative period 4.0 per cent, and during the after 

 periods 4.2 per cent. These data show that almost no disturbance in the] 

 metabolism of fat is caused by the administration of the preservative. 



INFLUENCE OF BORIC ACID AND BORAX UPON THE OXIDATION OF THE 

 COMBUSTIBLE MATTER IN THE FOOD. 



The collected data of all the series (except Series II) show that 6.4 

 per cent of the combustible matter in the food is eliminated, unbumedj 

 during the fore periods, 6.6 per cent during the preservative periods, and 

 7.0 per cent during the after periods. These data show a slight tend-i 

 ency on the part of the preservative to interfere with the combustion oi 

 the food in the body, and this tendency is continued in even a mor4 

 marked manner during the after periods. 



INFLUENCE OF THE PRESERVATIVE UPON THE SOLIDS EXCRETED. 



The solids summary for all of the series (except Series II) shows thati 

 the average quantity of solids in the food during the fore periods is 631.5 

 grams, during the preservative periods 627.6 grams, and during the after] 

 periods 614.1 grams. The average dailj r quantity of solids appearing inn 

 the feces in the fore periods is 25.6 grams, in the preservative periods] 

 28.6 grams, and in the after periods 28.3 grams. The average quantity] 

 appearing in the urine during the fore periods is 64.48 grams, during] 

 the preservative periods 59.37 grams, and in the after periods 

 grams. The average balance of total solids during the fore periods i 





