BORIC ACID AND BORAX. 227 



These data show a marked increase in the percentage of phosphoric 

 acid eliminated during the administration of the boric acid and a very 

 marked decrease during the after period. 



The summary for five men shows the same tendency to increase the 

 elimination of phosphoric acid during the preservative period. 



SERIES IV. 



Attention has already been called to the fragmentary nature of the 

 data of the fourth series, and this fact must be considered in the inter- 

 pretation of the data in so far as they have been obtained. Only in 

 the cases of Nos. 8, 9, and 10 are complete data available. In these 

 cases it is seen that the percentage of elimination during the fore 

 period is 89.6; during the first preservative subperiod, 104.9; during 

 the second, 89.1; during the first and second subperiods together, 96.9; 

 during the third subperiod, 100; during the first, second, and third 

 together, 98.1; during the fourth subperiod, 96.9; and during the first, 

 second, third, and fourth subperiods together, 97.8; during the after 

 period, 94.6. 



In this series we again see a marked influence exerted to increase 

 the excretion of the phosphoric acid during the administration of the 

 borax. 



In the cases of Nos. 11 and 12 illness required the interruption of 

 the observations for a time. They were subjected to renewed observa- 

 tions on March 31 and April 3, respectively. During the fore period, 

 which lasted to April 3 and April 5, inclusive, respectively, the per- 

 centage of phosphoric acid eliminated is 79. During the preservative 

 period, April 4 to April 14, inclusive, the percentage eliminated is 

 103. During the after period, April 15 to April 22, inclusive, the 

 percentage is 100.3. These data show the same tendency as those for 

 the three men, but they are not conclusive by reason of the fact that 

 the observations began immediately after illness. 



SERIES V. 



In this period we have a peculiar condition confronting us. It must 

 have been an abnormal period, in so far as the excretion of phosphoric 

 acid is concerned, throughout the whole of its duration of more than 

 two months. At the very beginning it is seen that the amount of phos- 

 phoric acid eliminated during the fore period is abnormal, amounting 

 to 112.4 per cent for Nos. 1, 3, and 5, who completed the entire course. 

 This falls during the first preservative subperiod to 105.9. It rises 

 during the first and second subperiods together to 106.8. There is 

 again a slight increase in the first, second, and third subperiods, taken 

 together, to 107.9 per cent, and during the first, second, third, t and 

 fourth subperiods the percentage is about the same, 107.8. During the 

 after period it falls to 106.3 per cent. It is thus seen that the data for 



