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MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



The following table gives the data for the amount and composition of the urine. In previous 

 experiments the urine was collected in 6-hour intervals throughout the day. Inasmuch, however, 

 as the subject at times found it difficult to get to sleep again after emptying the bladder at 1 

 o'clock in the morning, the urine was collected at 11 p. m., immediately before retiring, instead 

 of 1 a. m. . as in the previous experiment. The day is thus subdivided into two periods of 6 hours, 

 one of 4, and one of 8 hours. 



During the first 3 days of the preliminary digestion period, the subject eliminated 17.3, 11.8, 

 and 14.0 grams, respectively, of nitrogen in the urine. During these days alcohol did not form 

 a part of the diet. On the third day of the preliminary period, which was the first daj r upon 

 which alcohol was added to the diet, the elimination of nitrogen in the urine amounted to 13.7 

 grams. It will be noticed that after the subject entered the apparatus the amount of nitrogen in 

 the urine was larger in amount, but remained quite uniform throughout the whole series of 

 experiments. As has previously been remarked, it is not infrequently the case that an increased 

 elimination of nitrogen takes place when the subject enters the respiration chamber. This may 

 account for the increase in the present case. Another explanation of the increase would be to 

 assume that it was caused by the presence of alcohol in the diet. It is noticeable, however, that 

 it did not take place until the subject entered the calorimeter, a day after alcohol was added to the 

 diet, and that it continued throughout the 9 days of the sojourn in the respiration chamber, during 

 but 3 of which alcohol was a part of the diet. The urine was not collected after the close of the 

 experiments. 



Table L. — Amount, specific gravity, and nitrogen of urine, by G-hour periods — Metabolism experiment* Nos. J. '-34. 



