176 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



also an additional slight diminution in the quantity of total solids 

 eliminated, while the quantity of common salt separated remains prac- 

 tically the same as in the preservative period. 



In cases of incipient illness there was often noted a marked decrease 

 of salt in the urine. The data of No. 11 show this phenomenon in a 

 notable degree. The quantity of salt excreted on April 1 in this case 

 is only a little over 1 gram and the mean quantity from March 31 to 

 April 3, inclusive, is a little over 2 grams daily. 



The case of No. 12 is similar to that of No. 11; the fore period 

 begins April 3, the preservative period April 6, and the after period 

 April 15. There is here, also, a low specific gravity of the urine, 

 being practically the same, however, for all periods, showing a 

 remarkable constancy of composition in so far as specific gravity is 

 concerned. There was, however, a decrease in volume in the pre- 

 servative period and a continued decrease in the after period. Of 

 the total solids eliminated, we find in the fore period 57.53 grams 

 daily, in the preservative period 62.83 grams, while in the after 

 period the amount falls to 51.36 grams daily. Of common salt, the 

 quantity eliminated during the fore period is 11.50 grams daily, dur- 

 ing the preservative period 11.34 grams, and during the after period 

 8.66 grams. The quantities of common salt eliminated by this subject, 

 it is seen, are very much larger than those thrown off by any other 

 of the members of -the class, but the records show he also consumed a 

 greater quantity. 



In the case of No. 7 the data are complete only for the prelimi- 

 nary period and the first preservative subperiod. At the end of this 

 period No. 7, by reason of removal from the city, withdrew from the 

 table. The volume of the urine during the fore period in the case of 

 No. 7 is 667 cc and during the first preservative subperiod 685 cc daily. 

 The specific gravity during the fore period is slightly lower than dur- 

 ing the first preservative subperiod. The total solids eliminated are 

 considerably greater in the first subperiod than during the preliminary 

 period, and the same is true of the quantity of common salt eliminated. 



Bringing together the data in the cases of Nos. 8, 9, and 10, we find 

 the total volume of urine for the fore period to be 1,065 cc, for the 

 preservative period 1,099 cc, and for the after period 1,046 cc daily. 

 There seems, in this instance, to be a slight tendency pn the part of 

 the preservative to increase the volume of the urine, but this increase 

 is extremely minute. As regards the specific gravity, it. is found to 

 be 1.0244 during the fore period, 1.0232 as the average of the preserv- 

 ative period, and 1.0225 during the after period. There seems to be 

 a tendency manifested here on the part of the preservative to gradu- 

 ally lower the specific gravity of the urine. This effect, however, is 

 not very well marked. In regard to the total solids eliminated, we 

 find that during the fore period the amount is 61.095 grams, during 



