36 



August Krogh and Marie Krogh. 



Table 4, Excretion of urine and nitrogen in 24 hour periods. 



22,_.23/j 

 2S|_.24b 



^/8-3/8 

 *i8-^/8 



"I8-1-/8 

 12|8-l'l8 

 13/8-»/8 



M D. 



Experiment I. 

 12 md. — 12 md. 



С W. 



A. S. 



Experiment II. 

 2 p. m. — 2 p. m. 



N. D. 



B. w. 



Experiment III. 

 2 p. m. — 2 p. m. 



A M. 



Experiment IV. 

 2 p. m. — 2 p. m. 



N. D. 



3.4 

 3.6 

 4.1 

 3.2 



employed by us in Greenland was found to yield in the Esbach tube 

 90.6 % of the nitrogen in urea and 95.5 "/o from ammonia. 



Of the other nitrogenous compounds present in urine some will 

 react with hypobromite and yield gaseous nitrogen while others will 

 not. The quantities of gas produced depend to a certain extent on 

 the composition of the reagent, but they are in all cases far below the 

 total N and as a rule lie between 15 and 40 % ^. 



In accordance with the fact that only part of the nitrogen is libe- 

 rated from urine by hypobromite we find by comparison of the Kjel- 



1 Creatine gives 53.6 "/o, creatinine 13.7 "/q. Oxyproteic acid and allantoin 

 are said by Mørner to give about 20 "/o- Uric acid will ultimately yield about 

 38 "/o but reacts very slowly with hypobromite. Hippuric acid, amino acids and 

 polypeptides do not yield any gaseous nitrogen. 



