color tecame red. (2) A violet color was obtained when a 

 solution of the acid was treated with a drop of sodium carbon- 

 ate solution and then with a drop of ferrous sulphate. (3) It 

 reduced ammoniacal silver nitrate. (4) It did not reduce 

 Fehling solution. 



The filtrate supposed to contain phloroglucinol was 

 treated with hydrogen sulphide to remove lead, filtered, 

 and shaken with ether. The reoidue left on evaporating the 

 ether was taken up in water. This solution gave the following 

 reactions characteristic for phloroglueinol: (l) It reduced 

 "both silver nitrate and Fehling solution, (2) It colored 

 pine wood moistened with hydrochloric acid red. (3) It gave 

 a teautifal red color with vanillin and hydrochloric acid, 

 and (4) a deeper red color with oil of cloves and hydrochloric 

 acid, hecoming purple on standing. (5) It gave a violet 

 color with ferric chloride. 



The substance is then, without doubt, fisetin. The 

 1 

 formula of fisetin is supposed to be 



(C/r^-oO^,) 



Biochem. Pflan. II, 521. 

 -31- 



