226 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



104.7; during the second subperiod, 92.9; during the third subperiod, 

 99.2; during the first, .second, and third subperiods together, 99.3, and 

 during the after period, 99.2. 



In these data it is seen that the quantity of phosphoric acid elimi- 

 nated is greater during the preservative period than during the fore 

 period and almost the same as during the after period. In this connec- 

 tion it must be remembered, however, that the effect of the boric acid 

 must extend to a considerable part of the after period, inasmuch as it 

 requires a number of days after the administration of the preservative 

 is discontinued before the accumulated stock in the body is completely 

 eliminated. 



SERIES II. 



In this series, as has already been intimated, the data are incomplete 

 by reason of the illness of Nos. 8, 9, and 11 for the whole period, of 

 No. 12 during a portion of the preservative period, and of all the 

 members of the class during the after period. The f ragmentaiy data 

 may be of some value and are given complete in so far as they could 

 be determined. 



The mean daily percentage of elimination during the fore period of 

 Nos. 7, 10, and 12 in Series II is 94.1; during the first preservative 

 subperiod, 95.6; during the second subperiod, 101; during the two sub- 

 periods together, 98.4. As already stated, by reason of the illness of 

 the entire class there is no after period. 



In these data, fragmentary though they are, we notice a marked 

 increase in the quantity of phosphoric acid excreted during the pre- 

 servative period. The above summary stops with the second subpe- 

 riod, as No. 12 received no preservative after that time. Nos. 7 and 

 10, however, continued through the third subperiod, and the summary 

 for these two men shows the following data: 



During the fore period the average percentage of phosphoric acid 

 eliminated is 99.4; for the first preservative subperiod, 100.7; for the 

 second subperiod, 104.2; for the two subperiods together, 102.7; for 

 the third subperiod, 98.6; for the three subperiods, 101.2. 



The conclusion based on the data for the three subjects above men- 

 tioned are confirmed by the data for the two, viz, Nos. 7 and 10. 



SERIES III. 



This series of observations, showing the percentage of phosphoric 

 acid eliminated, is also incomplete by reason of the illness of No. 6 

 after the fore period and No. 2 after the first preservative subperiod. 

 The other data are complete. The mean daily percentage of elimina- 

 tion of phosphoric acid during the fore period is 93.5; during thje first 

 preservative subperiod, 105.6; during the second, 98.2; during the 

 third subperiod, 97.7; during the first, second, and third subperiods 

 together, 100,4; and during the after period, 86. 



