844 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



milligrams. The amount of sulphur in the after period is 4 milli- 

 grams less than that excreted in the fore period. There is an increase 

 of 107 milligrams as neutral sulphur over that found in the fore period 

 and an increase of 60 milligrams in the after period over the fore 

 period. The total sulphates show an increase of 567 milligrams in the 

 preservative period and in the after period a decrease from that of the 

 fore period of 70 milligrams. The amount of ethereal sulphates is 

 practically constant throughout the fore period and preservative 

 period, falling to 156 milligrams in the after period. Inorganic sul- 

 phates show an increase, namely, 565 milligrams. The ratio of the 

 ethereal to the inorganic sulphates for the fore period is 1:13.1, for 

 the preservative period 1 : 16.4, and for the after period 1 : 13.5. This 

 increase in magnitude in the preservative period is due wholly to the 

 increase in the inorganic sulphates, which points to the fact that the 

 sulphur ingested in the preservative has all been oxidized. It should 

 be noted in this table that the data for the after period fall to the 

 same amounts, or even less, than the amounts eliminated in the fore 

 period. In considering this, it should be explained that the fourth 

 preservative subperiod is omitted in the summary for these subjects, 

 as three of them, namely, Nos. 3, 5, and 6, did not receive the preserv- 

 ative during the fourth subperiod and No. 5 during only part of the 

 third subperiod. Since the actual after period in the case of these 

 subjects covered fifteen days, it is only natural that the data for the 

 after period as given have returned to normal, showing that all the 

 sulphur ingested was eliminated during this length of time. It is seen 

 that there is a slight increase in the percentage amount of neutral sul- 

 phur eliminated, which increase is shown also in the after period. 

 The percentage of total sulphates is fairly constant for the fore period 

 and the preservative period, but is reduced somewhat in the after 

 period. There is a decrease in the percentage of ethereal sulphates in 

 the preservative period and a slight increased percentage elimination 

 of the inorganic sulphates, which decreases in the after period to a 

 quantity less than in the fore period. In this summary it is seen that 

 the large increase of sulphur excreted is found as inorganic sulphates. 

 The average daily amount of sulphur ingested in the preservative for 

 these six men for the three subperiods is 484 milligrams, as SO 2 or 242 

 milligrams of sulphur as S, and the total sulphur eliminated in the 

 preservative period is 270 milligrams above that of the fore period. 

 It is evident, therefore, that there has been an increase in the excre- 

 tion of metabolized sulphur during the preservative period over the 

 amount of sulphur given in the preservative, indicating an increased 

 katabolism. There is also an increase in the amount of neutral sul- 

 phur eliminated, which tends to show that some of the sulphur, 

 whether obtained directly from katabolism or from the sulphur 



