A Study of the Diet and Metabolism of Eskimos. 



33 



the excretion of N rises or falls, the excretion of water rises or falls 

 also and the two curves for the same individual are consequently 

 very similar in appearance. In some cases it is obvious that we have 

 a washing out of N because a large amount of water has to be got 

 rid of as f. inst. several times in curve I M. D. These cases are charac- 

 terized by a more or less considerable fall in TV concentration. At 

 9 a. m. on the '^^|^ we find an excretion amounting to 445 cc. with 2.6 gr. 



'/Ö y<i 



Fig. 12. Exp. 



Гв Vs 



III. Curves for urine and respiratory exchange. 



N per hour (concentration only 0.6) but this enormous elimination 

 of water was maintained only for 40 minutes. Corresponding instances 

 of a decrease in N excretion from lack of water characterized by a 

 fall in the excretion of water and N and a considerable rise in con- 

 centration are also present (exp. Ill B. W. ^/g 6.20 a. m.) but are na- 

 turally much less pronounced. 



In a number of instances on the other hand we have an increase 

 in concentration along with an increase in the total quantity of ni- 

 trogen excreted. In these cases the rise in N excretion must be the 

 primary factor which involves also an increase in diuresis. The ni- 



LI. 3 



