Metabolism Experiment No. 59. 



27 



the determinations consisted not only of nitrogen and heat of combustion, but 

 also of water, carbon, hydrogen of organic matter, and ash. The results of all 

 determinations by periods are given in table 3. 



Table 3. Determinations in urine per period and per day Metabolism experiment 



No. 59. 



The accuracy of the nitrogen determinations and the method of taking 

 composite samples is checked by the agreement between the sum of the amounts 

 of nitrogen in the samples for periods and in the composite samples. Thus, 

 on the first day the total amount of nitrogen eliminated, as determined from 

 the total composite sample, was 11.86 grams and the total amount of nitrogen 

 as determined from the 6 periods was 11.84 grams. The nitrogen in the total 

 composite for the 3 days was 40.73 grams, while the nitrogen eliminated for 



