152 LABORATORY METHODS OP 



be differentiated by simply boiling it with a mineral 

 acid. If a substance is produced that is reduced by 

 cupric oxid the substance is mucin; if not reduced, it 

 is nucleo^albumin. 



PEPTONES. 



Test for peptones in the urine: Place a drachm 

 of Fehling's Solution in a test-tube, and put a small 

 amount of urine in the tube, and if peptones are pres- 

 ent a halo of a rose-colored hue will float, forming the 

 test for peptones. .(For the pathology for peptonura 

 see Practice of Medicine.) 



SUGAR TEST. 



Moore's Test for sugar in the uf ine : Take a small 

 quantity of urine in a test-tube and one-half as much 

 strong alkali and boil, and if a reddish-brown or yel- 

 lowish-brown precipitate appears, sugar is present. 

 This precipitate intensifies as the boiling is continued. 



HYDROBILIRUBIN. 



Test for hydrobilirubin or urobilin : Add a small 

 quantity of ammonia to the urine to be tested and fil- 

 ter the same. To the filtrate add a little chloride of 

 zinc, and if a green color appears, urobilin is present. 



