1 



(2) With thymol and sulphuric acid, a red color. 



2 



(3) With resorcinol and sulphuric acid, red color, 



3 



(4) With orcinol ^d hydrochloric acid, red color. 



(5) With ammonium picrate and sodium picrate, yellow- 



ish red color. 



(6) With phloroglucinol and hydrochloric acid, red color. 



(7) It decolorized an alkaline solution of potassium 



feri cyanide. 



(8) It gave a white precipitate with lead acetate. 



The filtrate B (p. 3.7 of this manuscript) from which gallic 

 acid was precipitated hy sulphuric acid in four fractions was 

 saved to examine for sugar. fo remove gallic acid completely^ 

 and other vegetable matter, it was shaken out several times 

 with ether, and was kept at a low temperature with salt and ice 

 for a long time. It was left standing for several weeks during 

 which time more hrovm matter separated out and was filtered 

 off. The filtrate was eraporated to a small "bulk, cooled 

 and filtered from cjrystals of potassiiun sulphate. The filtrate 

 was evaporated to dryness, the residue taken up in water and 

 filtered through honehlack. Addition of alcohol caused com- 

 plete precipitation of potassium sulphate. The solution then 

 gave the above mentioned characteristic^ for rhamnose. 



1. Chem. der Zuck. 



2. Eayman, 3ur I'Isodulcite, Bull . Soc . Chim. 47, 668 (1887). 



3. Acides Gummigues. 



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