BORIC ACID AND BORAX. 223 



completed the fore period and the first preservative subperiod; No. 11 

 completed all the periods, but received a different amount of preserv- 

 ative from that given to Nos. 8, 9, and 10. In the table, therefore, 

 there is a summary of the data for Nos. 8, 9, and 10 for the entire 

 period; for Nos. 7, 8, 9, 10, and 12 for the fore period and the first 

 preservative subperiod, and for Nos. 11 and 12 for the whole period. 



In the case of Nos. 8, 9, and 10 it is seen that the average daily bal- 

 ance for the fore period is 0.51 gram. The highest positive balance 

 for the period is in the case of No. 8, namely, 6, and the smallest 

 positive balance is in No. 4, 1.95. 



For the first preservative subperiod the average daily balance per man 

 is 0.24. The largest negative balance is in the case of No. 10, namely, 

 1.54, and the smallest in No. 9, 0.01. There are no positive balances. 



For the second subperiod the average daily balance is 0.54. The 

 largest positive balance is in the case of No. 9, namely, 3.12, and the 

 smallest in the case of No. 10, 1.65. There are no negative balances. 



For the two subperiods March 28 to April 4, inclusive, the average 

 daily balance is 0.15. The largest positive balance is in the case of 

 No. 9, namely, 3.11, and the smallest in No. 10, 0.11. There are no 

 negative balances. 



For the third subperiod the average daily balance is 0.00. The 

 largest positive balance is in the case of No. 8, namety, 1.33, and the 

 only negative balance in No. 9, 1.35. 



For the three subperiods, March 28 to April 9, inclusive, the aver- 

 age daily balance is 0.09. The largest positive balance is in the case 

 of No. 9, namely, 1.T6, and the smallest in No. 10, 0.14. There are 

 no negative balances. 



For the fourth subperiod the average daily balance is 0.15. The 

 largest positive balance is in the case of No. 8, namely, 2.38, and the 

 largest negative balance is in the case of No. 9, 0.12. 



For the four subperiods from March 28 to April 14, inclusive, the 

 average daily balance is 0.11. The largest positive balance is in the 

 case of No. 8, namely, 4.10 for the whole period, and the smallest is 

 in No. 10, 0.12. There are no negative balances. 



For the after period the average daily balance is 0.24. The largest 

 positive balance is in the case of No. 8, namely, 2.98, and the only 

 negative balance is in the case of No. 10, 0.30. 



Considering Nos. 7, 8, 9, 10, and 12, for the fore period the average 

 daily balance is 0.28, and for the first preservative subperiod it is 0.31. 



In the case of Nos. 11 and 12 there were some irregularities in the 

 conduct of the experiment. No. 11 was not under observation at 

 all from March 27 until March 31, and No. 12 was not under observa- 

 tion until April 3. From March 31 to April 3 in the case of No. 11, 

 and from April 3 to April 5 in the case of No. 12 constituted the fore 

 period, no preservative being given. The average daily balance for 



