It had a pleasant sweet odor. It was extracted several times 

 with hot water each portion teing filtered. A yellow trown 

 powder rgnained undissolved and was saved. The combined 

 filtrates deposited more of the yellow solid on standing. 

 This powder will he referred to later as "P". The filtered 

 liquid was freed from lead by hydrogen sulphide. T^e solu- 

 tion then had a lemon yellow color, a sweet odor and was acid 

 from acetic acid. On concentrating the solution by evapora- 

 tion and making a small portion of it alkaline with sodium hydrox- 



1 

 ide» the yellow color came out very intense • The alkaline 



solution reduced Fehling solution and emmoniaoal silver nitrate 

 indicating the presence of a sugar. Another portion of the 

 solution gave a slight precipitate with phenyl hydrazine in the 

 cold. The remainder of the solution was evaporated to dryness, 

 extracted with water, filtered, and again evaporated, A dark 

 sticky syrup was left which was only partly soluble in water. 

 Thi3 was treated with water, the filtrate filtered, and evaporat- 

 ed, the water being replaced from time to time to remove acetic 

 acid. Finally the liquid gave the following tests for rhamnose, 



besides those already mentioned: 



2 

 (1) With a-napthol and sulphuric acid, a purple violet 

 color, 



1, "By warniing with alkalies or barium hydroxide, rhamnose 



is colored yellow"- ^ * 



Von lippmann, Chem. der Zuoker. I, 177, 



2, Chem, der Zuek. 



-34- 



