. 



HUROUS ACID AND SULPHITES. 



843 



sulphur^rowsHr decided increase during "the preservative period, 

 which is maintained during the after period, but to a less extent. The 

 inorganic sulphates again bear the greater part of the increase. The 

 percentage elimination of neutral sulphur is increased during the 

 preservative period, while the other forms are decreased. 



Reviewing the entire individual data, there is seen an increase in 

 every instance in the amount of neutral sulphur, while there is a 

 decrease in the percentage amount in the cases of Nos. 2 and 8 and a 

 noticeable increase in the actual amount of ethereal sulphates in the 

 cases of Nos. 3, 5, 6, 9, 1 1, and 12. The percentage amount of neutral 

 sulphur is largely increased in the cases of Nos. 6 and 8 in the after 

 period. Nos. 9 and 1 1 present a peculiar condition, namely, a decrease 

 in the preservative period in the ratio of the ethereal to inorganic 

 sulphates. This shows a relatively larger increase in the ethereal 

 sulphates for these subjects than in the inorganic sulphates. 



The relative increase or decrease in the sulphur compounds which 

 are affected by the administration of the preservative are shown in 

 Table IX. In the case of those subjects receiving sodium sulphite 

 it is strikingly shown that when there is a decrease or but a slight 

 increase in the percentage amount of neutral sulphur eliminated there 

 is an increase in the inorganic sulphates. In the case of No. 1 the 

 converse is true, there being a large increase in neutral sulphur and a 

 corresponding decrease in inorganic sulphur. 



The subjects receiving sulphurous acid show that when the per- 

 centage amounts of neutral sulphur are largely increased the inor- 

 ganic sulphates show a corresponding decrease. In this instance the 

 converse is true of No. 8, which shows a decrease in neutral sulphur 

 and an increase in inorganic sulphates. 



TABLE IX. Urine determinations Daily increase or decrease of the percentage amounts 

 of neutral sulphur and inorganic sulphates eliminated during the preservative period, 

 Series VII. 



SUMMARIES. 



In the summary for Nos. 1 to 6, inclusive, complete data are given 

 for the fore period, the first three subperiods of the preservative 

 period, and the after period. In this summary the increase in the 

 total sulphur excreted in the preservative period amounts to 270 



