938 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



the same in the fore and preservative periods, and markedly greater 

 in the after period. The quantity of sulphur excreted in the urine 

 is markedly greater in the preservative period. The balance in the 

 fore period is positive and its magnitude is 0.239 gram. The balance 

 of the preservative period is negative when the sulphur of the food 

 only is taken into consideration. When the sulphur preservative is 

 considered, the balance is positive. At the same time, it is much 

 less positive than in the fore period, and this fact indicates a tend- 

 ency of the preservative to increase the excretion of sulphur. Since 

 the amount of sulphur eliminated in the feces in the preservative 

 period was the same as in the fore period, this increase is entirely due 

 to the sulphur eliminated -in the urine. The effect of the preservative 

 in this respect bears out the data as obtained for No. 8 and shows a 

 marked influence on the metabolism of sulphur. The balance is 

 positive in the after period, its magnitude being 0.022 gram. 



The quantity of sulphur administered to No. 10 is almost the same 

 in the fore and after periods, but slightly less in the preservative 

 period. The quantity excreted in the feces is slightly greater in the 

 preservative and after periods, while the amount excreted in the 

 urine is less than in any of the previous instances; in fact, the excess 

 over the other periods is not very well marked. The balances are all 

 positive and of the following magnitudes for the three periods 

 respectively: 0.212 gram, 0.086 gram, and 0.135 gram. 



The quantity of sulphur administered in the food in the case of 

 No. 1 1 is practically the same in all the periods. The elimination of 

 sulphur in the feces is almost the same in the fore and preservative 

 periods and slightly less in the after period. There is a slight increase 

 in the amount of sulphur eliminated in the urine in the preservative 

 period, which, when only the sulphur in the food is taken into con- 

 sideration, is not sufficient to produce a negative balance. This fact, 

 as in the preceding case, is peculiar, inasmuch as in the case of all 

 the other subjects negative balances .were obtained, as would be ex- 

 pected. It is possible that a part of the sulphurous acid gas adminis- 

 tered escaped before entering the digestive processes and becoming 

 oxidized. The positive balances in this case amount to 0.219 gram in 

 the fore period, 0.108 gram and 0.279 gram in the preservative period, 

 and 0.248 gram for the after period. 



The quantity of sulphur in the food of No. 12 is practically the 

 same in the fore and preservative periods and slightly less in the after 

 period. The elimination in the feces is less in the preservative 

 period and markedly less in the after period than in the fore period. 

 The increase of the sulphur in the urine in the preservative period is 

 sufficient to produce a negative balance of 0.04 when only the food 

 sulphur is considered. Balance II is positive and amounts to 0.072 

 gram. The balance is positive in the after period and of a magni- 

 tude of 0.083 gram. 



