120 Transactions of the South African Philosophical Society. 



Not fluorescent in acid solution .... 



Solubility Very soluble in chloroform, alcohol, 



benzene, and also in very dilute 

 sulphuric and hydrochloric acid. 



Alkaline hydrates Not precipitated from dilute solu- 

 tions. 



Alkaline carbonates Not precipitated from dilute solu- 

 tions. 



Ammonia Precipitate, insoluble in excess. 



Picric Acid Amorphous yellow precipitate. 



Ferric chloride No precipitate. 



Platinum chloride No precipitate. 



Gold chloride Crimson lake and gold reduced. 



Potassium ferricyanide Keduced to ferrocyanide. 



Potassium sulphocyanide Nil. 



Chromic acid Reddish-brown precipitate soluble 



in excess with reddish-vermilion 

 colour. 



Phosphomolybdic acid Amorphous yellowish-white precipi- 

 tate. 



Phosphotungstic acid White precipitate. 



Iodo-potassium iodide Amorphous red-brown precipitate. 



Bismuth potassium iodide Curdy brick-red precipitate. 



Mercury potassium iodide Curdy white precipitate, insoluble in 



excess and in alcohol. 



Mercuric chloride White precipitate. 



Chlorine water (Thalleioquin test) . . Reddish-brown colouration. 



Bromine water Reddish-brown colouration. 



Concentrated sulphuric acid Slight vermilion colour. 



Concentrated sulphuric acid with 



sugar Slight darkening. 



Concentrated sulphuric acid with 



potassium dichromate Light yellow. 



Concentrated nitric acid Brownish-red colour. 



Erohde's reagent Dark blue changing into green. 



Marine's reagent Curdy white precipitate. 



Vitali's test Beautiful crimson lake. 



The last-mentioned reagent affords a very delicate test for this 

 substance. As already remarked, there appears to be little doubt 

 that it is a new alkaloid, but on account of insufficiency of material 

 further tests could not be made. It is interesting to note that the 

 tree attains a large size in the forest mentioned, and also in the 

 Mpami forest, Elliotdale, specimens occurring 4 feet in diameter 

 and 50 feet in height ; the abundance of the tree should, moreover, 

 render it possible, if the drug prove to be commercially valuable, to 

 obtain it in large quantities. 



In order to proceed with the research, a larger amount of the bark 

 has since been obtained, and is now in the hands of Mr. J. Muller, 

 B.A., the Government analyst in charge of the Laboratory at 



