BORIC ACID AND BORAX. 169 



solution. Thus the highest specific gravity is that of the fore period, 

 although the largest amount of total solids is not eliminated during 

 this period, and the lowest specific gravity is that of the last preserv- 

 ative subperiod, corresponding to next to the lowest quantity of total 

 solids eliminated. As indicated by the above data, the conclusion is 

 evident that the administration of the preservative produces a consid- 

 erable disturbance in the total quantity of solids eliminated in the 

 urine, and, consequently, in the specific gravity thereof. In the above 

 discussion only the direct relation of specific gravity to total solids is 

 considered. Attention should be called to the fact, however, that the 

 total solids are calculated from the specific gravity and volume of the 

 urine. When both these factors are considered, therefore, the true 

 relation of total solids to specific gravit} 7 becomes evident. 



SERIES II. 



Comparing the individuals of this series in regard to the volume of 

 urine voided, we note that during the fore period the largest quantity 

 is found in the case of No. 8, namely, a daily average of 1,426 cc, and 

 the smallest is found in the case of No. 7, namely, 998 cc. No. 7 was 

 ill and absent from the table from the 14th of February, but the urine 

 was collected until the end of period. The average for the three pre- 

 servative subperiods (January 28 to February 10) shows the largest 

 daily amount of urine in the case of No. 10, namely, 1,418 cc, and the 

 smallest in the case of No. 7, namely, 972 cc. , No. 10, however, was 

 ill and no sample of urine was saved after February 11. During this 

 period marked irregularities in the measurement of the urine were 

 caused by sickness in the case of No. 9, who received no preservative 

 after January 31, and to a. similar extent in the case of No. 8 and No. 

 11. These men received no preservative after the second preservative 

 subperiod. These disturbances, especially in the case of Nos. 8 and 

 11, manifest a notable decrease of the amount secreted, due to the 

 febrile conditions which exist. 



In the after period the largest amount of urine voided is found in 

 the case of No. 11, namely, 1,242 cc, and the smallest in the case of 

 No. 12, namely, 820 cc. No. 12 received no preservative after the 

 beginning of the third preservative subperiod. 



These individual data disclose a slight tendency, apparently due to 

 the administration of the preservative, to decrease the volume of urine 

 secreted. 



The general condition of the members of the class at the end of the 

 preservative period is quite unfavorable and this is due largely to 

 colds and other troubles not connected in any way with the adminis- 

 tration of the preservative; this unfavorable condition continues dur- 

 ing the short after period. 



The inception of any disease or sickness not directly traceable to the 



