URINE 



387 



Pepsin. 

 Enzymes Gastric rennin. 



Amylase. 



Acetic acid. 

 Volatile fatty acids. Butyric acid. 



Formic acid. 

 Paralactic acid. 

 Phenaceturic acid. 

 Urocanic acid. 



Phosphorized compounds .... 



Pigments 



Ptomaines and leucomaines. 



Glycerophosphoric acid. 

 Phosphocarnic acid. 

 Urochrome. 

 Urobilin. 

 Uroerythrin. 



Adenine. 

 Guanine. 

 Xan thine. 



- 



Epiguanine. 



Purine Bases I Episarkine. 



Hypoxanthine. 

 Paraxanthine. 

 He teroxan thine . 

 i -Methylxan thine. 



2. Inorganic Physiological Constituents 



Ammonia. 



Sulphates. 



Chlorides. 



Phosphates. 



Sodium and potassium. 



Calcium and magnesium. 



Carbonates. 



Iron. 



Fluorides. 



Nitrates. 



Silicates. 



Hydrogen peroxide. 



Normal urine varies widely in composition, being influenced by diet 

 and other factors. The following table represents the composition of a 

 normal urine. 1 



1 Vierordt: Daten und Tabellen. Jena, 1906, p. 330. 



