174 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



urine, and that this impairment persists for a considerable time after 

 the cessation of the administration. 



SERIES IV. 



The only complete comparisons in this series are of Nos. 8, 9, and 

 10. By reason of a disturbance on account of illness and other causes, 

 Nos. 7, 11, and 12 are made subjects of partial or fragmentary com- 

 parison. 



In the case of No. 8 it is seen that the volume of urine in the fore 

 period is 995 cc daily, during the preservative period 958 cc, and 

 during the after period 901 cc. There is thus a progressive decrease 

 in the quantity of urine. This can not, however, be attributed to the 

 preservative, because during the progress of this observation the season 

 advanced from earh r spring, March 20, to late spring, April 22. The 

 decrease, therefore, in this case in the volume of the urine is rather to 

 be ascribed to the progressive increase in temperature than to the 

 effect of the preservative. 



In the case of No. 9 the volume of the urine during the fore period 

 is 1,238 cc, during the preservative period 1, 34:3 cc, and during the after 

 period 1,374 cc daily. Here we have a slight increase in the volume 

 of the urine, which seems to depend either upon the action of the pre- 

 servative or upon the relative quantities of water consumed. 



In the case of No. 10 the volume of urine during the fore period is 

 971 cc daily, during the preservative period 995 cc, and during the 

 after period 864 cc. In this instance there is a very slight increase in 

 the volume of the urine during the preservative period and a consid- 

 erable decrease in the volume during the after period. 



In regard to the specific gravity of the urine, it is seen in the case 

 of No. 8 that there is little change throughout the period. 



In the case of No. 9 the urine is decidedly lighter than in the case 

 of No. 8, due doubtless to a larger volume. During the preservative 

 period, in which the volume is considerably increased, the specific 

 gravity is correspondingly lowered, and this dilution continues also 

 during the after period. 



With No. 10 the specific gravity is high, as compared with No. 9 

 and even with No. 8. There is a decided decrease in specific gravity 

 during the preservative period, and this dilution of the urine is con- 

 tinued during the after period. 



In regard to the quantity of total solids eliminated, we find a con- 

 siderable decrease in the case of No. 8 in the preservative period, the 

 average daily quantity falling from 59.57 grams to 56.20 grams. This 

 decrease in total solids continues also during the after period, the aver- 

 age daily quantity exuded during this period being 51.92 grams. In 

 this case the general effect of the preservative seems to have been to 



