B/>RIC ACID AND BORAX. 239 



average percentage of excretion of solids in the feces is 4.6 and in the 

 feces and urine 14.4, and the average balance is 515.984 grams. During 

 the after period, extending from January 4 to 13, inclusive, the aver- 

 age quantity of solids in the food is 616 grams, of which 28.3 appear 

 in the feces and 84.429 in the feces and urine. The percentage of 

 solids excreted in the feces is 4.6 and in the feces and urine 13.7, and 

 the average daily balance is 531.571 grams. 



It is interesting in this case to see what effect the administration of 

 the preservative had upon the total solids in the feces, and this is best 

 given by percentages rather than by actual quantities because of the 

 variation which takes place in the quantity of solids ingested. We see 

 in this instance that during the fore period the quantity of solids 

 eliminated by the feces is 4.2 per cent. During the three preservative 

 periods it is 4.6 per cent and during the after period 4.6 per cent. 

 These data show that there is possibly a slight tendency on the part of 

 the preservative to increase the solids in the feces. In the case of the 

 urine we find the average percentage of solids excreted during the fore 

 period is 9.7; during the three preservative periods, 9.8, and during 

 the after period, 9.1. In this connection it must be remembered that 

 practically all of the preservative administered appeared in the urine, 

 thus slightly increasing the solids therein. In general it may be said 

 that the preservative has an apparent tendency in this series to 

 increase the solids excreted in the feces. 



SERIES II. 



The data relating to this series are incomplete and highly unsatis- 

 factory for reasons already set forth, namely, on account of the 

 ravages of the grippe. All the members of the class during the lat- 

 ter part of this series were afflicted with more or less severe attacks 

 of influenza. Solids determinations were made for Nos. 7, 10, and 12 

 only. The data are interesting and valuable in individual cases, but 

 have been excluded from the general summary of the results. Never- 

 theless, it has been deemed advisable not to exclude these data from the 

 text and from discussion. As in the case of Series I, the individual 

 data will not be discussed in detail here, but only the summary in so 

 far as a comparison is possible. Two summaries are made of the com- 

 parable data in Series II, namety, a comparison of Nos. 7 and 10, and 

 second a comparison of Nos. 7, 10, and 12. In the case of Nos. 7 and 

 10 the mean quantity of solids ingested daily in the fore period is 673 

 grams, of which 31.8 gram's are recovered in the feces and 99.339 grams 

 in the feces and urine. These data represent 4.7 per cent of the total 

 solids in the food recovered in the feces and 14.8 per cent in the feces 

 and urine. The mean daily balance is 573.661 grams, this representing 

 the total solids utilized by the body. Without discussing the subperiods 

 separately, it will be sufficient to call attention to the summary of the 



