Metabolism Experiment No. 69. 



73 



Accordingly the subject was requested to drink considerable amounts of water 

 and no doubt consumed more than he desired, though it gave him no discomfort. 

 The daily amounts consumed and the estimates for the water consumed by 

 periods during the experiment are given in table 33. 



In estimating the quantity of water consumed during each of the periods for 

 which the amounts were not definitely shown, it was assumed that after a 

 weighed amount of water was placed in the calorimeter chamber equal amounts 

 were drunk during each 2-hour period until all this water was consumed. For 

 example, it was known that between the hours of 1 and 7 p. m. on December 

 16 the subject drank 4S9.10 grams of water. These 6 hours constituted three 

 experimental periods and it was assumed that one-third of this amount 

 (163.03) grams of water was taken during each period. While the apportion- 

 ment of the quantities for the different periods is at best but roughly approxi- 



Table 33. Record of water consumed Metabolism, experiment No. 69. 



1 Assumed in some instances. (See above.) 



mate, it must be borne in mind that the absolute amount of water taken during 

 the day was determined with accuracy. A similar apportionment has been 

 made of the water consumed on the subsequent days of the experiment. 



Urine. 



As in experiment No. 68, the urine was collected 4 times daily. In the 

 samples of urine thus collected a number of determinations were made which 

 are recorded in table 34. As a check on the nitrogen determinations the total 

 nitrogen was determined in the daily composite as well as by periods. 



Weight and composition of urine. In addition to the determinations of 

 nitrogen, specific gravity and reaction made upon urine collected by periods, 

 there were determined in the daily composite the water, total solids, ash, 

 nitrogen, carbon, hydrogen in organic matter, phosphorus, sulphur, and heat of 

 combustion. From the weight of urine and the percentages obtained in the 

 above determinations, the total amounts of each ingredient analyzed were 

 computed. These amounts are recorded in table 35. 



While in experiments Nos. 59 and 68 determinations of ash, carbon, and 

 hydrogen were made only on the composite urine for the whole experiment, in 



