EXCRETION BY THE KIDNEYS 



Titratable acidity in c.c. of decinormal acid - 617 



Indican (Fehling's solution 

 Volume of urine 



313! 



100 



- 77 



- 1430 c.c. 



The great influence of diet on the composition of the urine is illus- 

 trated in the following table. Urine I. was obtained from a man weigh- 

 ing 87 kilos on the standard protein-rich diet described above. Urine II. 

 was obtained from the same person on a diet very poor in protein 

 (400 grammes of starch and 300 c.c. of cream), containing only about 

 i gramme of nitrogen, as against 19 grammes in the first diet. 



The indican is given in arbitrary units, the indigo blue being obtained 

 from the urine and then estimated colorimetrically, using Fehling's solu- 



