172 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



still persists, though with a tendency toward the restoration of the 

 normal state, during the after period. The specific gravity of the 

 urine does not vary greatly except in one instance, namely, the second 

 preservative subperiod, when it is somewhat high. There is an 

 inclination in this case also toward a decrease in the total solids elimi- 

 nated by the urine during the period of administration of boric acid, 

 and indication of a return to normal conditions is manifest during the 

 after period. Again, the common salt excretion is diminished during 

 the administration of the preservative, and this diminution continues 

 into the after period, though with a tendency to return to the normal 

 state. 



With No. 3 there is a slight increase in the volume of urine pro- 

 duced during the administration of the preservative and a marked 

 decrease during the after period. The specific gravity remains fairly 

 constant, save for a small drop, during the second subperiod. The 

 total quantity of solids exuded in the urine is diminished during the 

 administration of the preservative, and this diminution continues with 

 increased rapidity during the after period. The amount of common 

 salt excreted appears to decrease during the preservative period, and 

 this diminution increases in a marked degree in the after period. 



With No. 4 there is a marked increase in the volume of urine during 

 the preservative period and a noticeable decrease during the after period. 

 There appears to be a marked depression in the specific gravity during 

 the second and third preservative subperiods, the number falling to 

 an abnormally low figure, and there is a general decrease of specific 

 gravity during the entire preservative period, due, probably in a 

 large measure, to the increased volume of urine excreted. There is an 

 increase in the specific gravity during the after period, due to dimin 

 ished volume. A marked increase is shown in the total quantity of 

 solids in the urine during the first preservative subperiod, while the 

 total average quantity for the three subperiods is very nearly the same 

 as that for the fore period. There is a remarkable decrease, however, 

 in the total solids excreted during the after period. The average 

 quantity of salt excreted during the preservative period is almost the 

 same as in the fore period, but the amount in the after period is very 

 much less. 



In the case of No. 5 there is little change in the volume of urine 

 during the preservative period, and it is slightly diminished during the 

 after period. The specific gravity remains quite constant throughout 

 the whole series of observations. The total solids excreted show a 

 constantly diminishing tendency, with the exception of the second 

 preservative subperiod, where the quantity excreted is slightly greater 

 than in the preceding subperiod. This diminution in the quantity of 

 total solids excreted continues in a marked degree during the after- 

 period. Common salt eliminated also diminishes during the preserva- 



