826 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



RATIO OF SULPHUR, SULPHATES, AND PHOSPHATES TO THE 

 NITROGEN EXCRETED IN THE URINE. 



In Table VII a study is given of the relations of sulphur as total 

 sulphur and as sulphates, and phosphorus as phosphoric anhydrid 

 to the nitrogen. Inasmuch as in this case the quantity of sulphur 

 and sulphates is largely increased in the preservative period and 

 increased to a certain extent in the after period, theoretically the 

 ratio of these bodies to the nitrogen would be smaller in the pre- 

 servative period and in the after period than in the fore period. The 

 practical point, therefore, to be kept in view would be the influence 

 exerted by the sulphurous acid upon the relative -proportions of nitro- 

 gen to phosphoric acid in the urine. For this purpose the small 

 variations in the amounts of these two bodies ingested in the various 

 periods may be left out of consideration. In the case of No. 1 the 

 ratio of phosphoric acid to the nitrogen rises in the preservative 

 period from 1:6.1 to 1:6.4. This increase is maintained also in 

 the after period, where the ratio rises to 1 : 6.5. 



In the case of No. 2 the phosphoric acid ratio in the preservative 

 period remains almost the same as in the fore period, and is the 

 same in the after period as in the preservative period, namely, 1 : 5.3. 

 In No. 3 the ratio of phosphoric acid to the nitrogen is increased, 

 rising from 1:6.8 to 1:7.1. This increase is practically maintained 

 in the after period, where it is 1:7.0. 



The ratio of phosphoric acid to nitrogen in the case of No. 4 is 

 considerably decreased in the preservative period, falling from 1:6.0 

 to 1:5.2, and remaining practically the same in the after period, 

 namely, 1:5.3. In the case of No. 5 the data are incomplete for 

 the fore period, and a comparison is of little value. For No. 6 the 

 ratio of phosphoric acid to nitrogen is increased from 1:5.0 to 1:6.0 

 in the preservative period and maintained almost at the same point 

 in the after period, namely, 1:5.9, the phosphoric acid in this case 

 being greatly reduced. 



In the case of No. 7 there is a marked increase in the magnitude 

 of the phosphoric acid ratio, which rises from 1:6.6 in the fore 

 period to 1:7.2 in the preservative period. There is a decrease in 

 the ratio of phosphoric acid to nitrogen in the case of No. 8, where 

 it falls from 1:6.2 in the fore period to 1:5.7 in the preservative 

 period, rising, however, in the after period to 1:6.6. The ratio of 

 phosphoric acid to nitrogen is decreased in the case of No. 9 in the 

 preservative period from 1:6. 5 to 1:6. 2. A slight increase is observed 

 in the after period, the magnitude of the ratio reaching 1:6.3. The 

 phosphoric acid ratio rises in the case of No. 10 from 1:5.9 in the 

 fore period to 1:6.0 in the preservative period, falling again in the 

 after period to the same magnitude as at first. 



In the case of No. 11 there is again an increase in the magnitude 

 of the phosphoric acid ratio in the preservative period, rising from 



