34 Studies on Water Drinking [Oct. 



Siihject V. The differences here are not so great as in the 

 case of subject C, but it will be seen, by examining Table 2, that 

 the values for the intermediate period are in all cases less than for 

 the preliminary period, 



Copious WATER-DRiNKiNG. It will be recalled that this experi- 

 ment was a continuation of the former, the intermediate period 

 serving as the final period for the "moderate water" experiment, 

 and as the preliminary period for the experiment on copious water- 

 drinking at meal time. 



As was mentioned before, the "copious water" period differed 

 from the intermediate and final periods in that 850 c.c. of distilled 

 water were added to the water-ingestion of each of the daily meals. 

 This made a total water-ingestion of 3,450 and 3,250 c.c. per day, 

 for subject C and for subject V, respectively. 



Siihject C. It is interesting to note that the values for total 

 nitrogen, bacterial nitrogen and percent of bacterial nitrogen in 

 fecal nitrogen, were less in all cases in the "copious water" period 

 than in the "moderate water" period; also, that the values for the 

 above were less in the final period than they were in the preliminary 

 period. This would seem to indicate clearly that the drinking of 

 moderate quantities of water with meals, 2,400 c.c. daily, had a 

 beneficial influence, while the beneficial influence of larger quantities, 

 3,250 c.c. daily, was still more pronounced. 



The most significant point regarding the bacterial-nitrogen 

 excretion of subject C is the fact that the value for the preliminary 

 period was much higher than that for any one of the four periods 

 which followed. In other words the daily Ingestion of 1,500 c.c. 

 of water during the period of moderate water-ingestion caused a 

 very pronounced reduction in the growth of intestinal bacteria ; and 

 this lowered development continued throughout the remainder of 

 the experiment. The daily output of dry bacterial substance for the 

 preliminary period (6.65 gm.) when compared with similar values 

 for the other periods of the experiment (4.96, 4.53, 4.62, and 4.95 

 gm.) demonstrates this point very nicely. 



Siihject V. Another interesting comparison may here be made 

 between the two subjects. As with subject C, the values for daily 

 excretion of total fecal nitrogen, bacterial nitrogen and percent of 



