224 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



this period for the two members is 0.73. No. 11 from April 4 to 11, 

 inclusive, and No. 12 from April 6 to 11, inclusive, received 1 gram 

 of borax per day, except on April 4, when No. 11 received only half 

 a gram. On April 12 and 13 each received 2 grams, and on April 14, 

 3 grams. The average daily balance for this period (April 4-14) is 

 0.12. During the after period the average daily balance for the two 

 is -0.01. 



The value of the data in the cases of Nos. 11 and 12 is, of course, 

 greatly vitiated by reason of the illness of these two members immedi- 

 ately preceding the experiment. In so far as it extends, however, they 

 show again a marked increase in the amount of phosphorus excreted 

 under the influence of the borax administered. During the after 

 period this increase was also continued, but in a very moderate degree. 



In the consideration of the data of Series IV for comparison with 

 the other series it is advisable to eliminate all except the complete data 

 for Nos. 8, 9, and 10. Considering these data, we find again the same 

 tendency as in Series I and III to increase the quantity of phosphoric 

 acid excreted under the influence of the borax. There is a marked 

 increase in excretion during the administration of borax, and there is 

 a tendency shown to return to the normal state by decreasing the 

 phosphoric acid excreted during the after period. 



SERIES V. 



In Series V the data are complete for only three members, namely, 

 Nos. 1, 3, and 5. The continued illness of No. 6, or, rather, his failure 

 to regain a perfectly normal state, excluded the data in his case from 

 consideration. No. 2 did not finish the fourth preservative subperiod, 

 while No. 4 did not finish the third subperiod. 



In the fore period, extending from April 24 to May 1, the average 

 daily balance for Nos. 1, 3, and 5 is 0.53. There are no positive 

 balances for the period. The largest negative balance is for No. 5, 3.96. 



During the whole of the preservative period, extending from May 

 2 to June 20, the uniform quantity of one-half gram of boric acid was 

 given daily. The data are so nearly the same that it is not neces- 

 sary to enter into any detailed discussion. The period was divided 

 into four subperiods for comparison. During the first and second 

 preservative subperiods, from May 2 to May 25, inclusive, the aver- 

 age daily balance for Nos. 1, 3, and 5 is 0.30. During the first, 

 second, and third subperiods, from May 2 to June 6, inclusive, the 

 mean daily balance is 0.35. During the first, second, third, and 

 fourth subperiods, May 2 to June 20, the average daily balance is 

 -0.34. 



During the after period, from June 21 to June 29, inclusive, the 

 average daily balance is 0.30. 



The data show practically no change in the phosphoric -acid balance 



