84 PHYSIOLOGICAL CHEMISTRY. 



6. Morner's Test. Add about 3 c.c. of Morner's reagent 1 to a 

 little tyrosine in a test-tube, and gently raise the temperature to the 

 boiling-point. A green color results. 



EXPERIMENTS ON LEUCINE. 



Make the following tests upon the leucine crystals already pre- 

 pared or upon some pure leucine furnished by the instructor. 



i, 2 and 3. Repeat these experiments according to the directions 

 given under Tyrosine (page 83). 



1 Morner's reagent is prepared by thoroughly mixing i volume of formalin, 

 45 volumes of distilled water and 55 volumes of concentrated sulphuric acid. 



