222 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



As has been before intimated, there were no comparable data obtained 

 for the after period on account of the illness of all the members of the 

 class. 



For the fore period the average daily balance for Nos. 1, 3, 4, and 5 

 is 0.31 gram. The largest positive balance for the period is found in 

 the case of No. 4, namely, 5.56, and the only negative balance in the 

 case of No. 1, 1.30. 



The data for the first preservative subperiod are incomplete by 

 reason of the loss of all the samples of urine for March 2. For the 

 other three days the average daily balance is 0.26. The largest posi- 

 tive balance is found in the case of No. 3, namely, 0.77, and the largest 

 negative balance in the case of No. 5, 2.60. No. 6, by reason of illness, 

 took no part in this and the subsequent periods of this series. 



For the second subperiod, March 4 to 7, inclusive, the average daily 

 balance is 0.08. The largest positive balance for the period is found 

 in the case of No. 3, namely, 1.60, and the only negative balance in 

 No. 4, 0.97. 



For the third subperiod, extending from March 8 to 11, inclusive, 

 the average daily balance is 0.08. The largest positive balance for 

 this period is in the case of No. 1, namely, 1.59, and the only negative 

 balance in the case of No. 4, 1 .56. 



For the three subperiods, extending from February 28 to March 11, 

 inclusive, the average daily balance is 0.02. The largest positive 

 balance for the period ig found in the case of No. 3, namely, 2.88, and 

 the largest negative balance in No. 4, 3.87. 



For the after period, extending from March 12 to March 19, the 

 average daily balance is 0.65. The largest positive balance is found in 

 the case of No. 5, namely, 6.08, and the smallest positive balance in No. 

 1, 1.60. There were no negative balances during this period. 



In studying the data as a whole it is seen, as in the case of the first 

 series, that the administration of the preservative did not exert any 

 very marked effect upon the excretion of phosphorus. The same 

 tendency, however, which is manifested in the first series is maintained 

 in the third, i. e., an increase during the preservative period in the 

 amount of phosphorus excreted. Unlike the first series, however, 

 the quantity of phosphorus excreted diminished considerably during 

 the after period of the third series. 



SERIES IV. 



During the fourth series, extending from March 20 to April 22, 

 inclusive, there was a considerable derangement of the comparative 

 work by reason of illness of some of the members of the experimental 

 table. 



Only Nos. 8, 9, and 10 completed the entire fourth series. No. 7 



