58 



DICTIONARY OF THE ACTIVE PRINCIPI-ES OF PLANTS. 



softer and has hop odour, presumably due to admixture with hop-oil, for, 

 on adding water to an alkaline alcoholic solution of the resin, a precipitate 

 forms having bop odour, from which the resin separable from the filtrate 

 by acidification is free. 

 Solubility as Alpha-resin. 

 Reactions : 



Lead acetate, alcoholic, no pp. 



„ „ aqueous, pp. 



Other reactions as Alpha-rei-in (with the cupric test, the ether 

 becomes coloured emerald-green). 

 (4) GAMMA-RESIN (Hayduck's) ; hard, brittle, dark brown; 7iQt bitter. 

 Solubility as Alpha and Beta, except that it is not dissolved by petro- 

 leum ether. 



Reactions : 



Lead acetate (alcoholic), no pp. 



Does not give the cupric reaction with ether. 



§1:^3. HURA crepitans ('Ajuapar'); Eiiphorhiaceo'. Investigator: 

 Boussingault, Ann. Chim. P!n/«., [-2] 28, 430 (1825). 



HURIN B. ; oily, becoming crystalline ; M.P. above 10(1°, but volatile at 

 lower temperatures : vapours cause inflammation ; no odour, but burning 

 ta.ote. 



Soluble in alcohol, ether and oils, but not in water. 



Unchanged by alkalies. 



Resinified by nitric acid. 



§ 124. HY.SNANCHE globosa (Toxicodendron capense) ; Euphor- 

 hiwra . The husk (about 3 per cent.). Investigator : Engelhardt, 



Arhrifrn d. phai-nial: Imt. VurjnU, 8, 1892. 



HY/ENANCHIN B. ; crystalline after purification ; bitter. Physiological 

 action like Str3chnine, but much weaker. Non-glucosidal, but destroyed 

 by acids or alkalies at 10(J° C. 



Soluble in water, alcohol (the best solvent), ether, benzene, fatty oils. 



Not precipitated by neutral lead acetate. 



§ 12.-,. HYMENODICTYON excelsum (Cinchona excelsa, Roxb.) and 

 H. ohovatum ; liuhhiren. [See also Cinchona ; and for ^Esculin, which is 

 said to have been found in this plant, refer to ^Esculus. Naylor disputes 

 the presence of ^Esculin.] Investigator : Naylor, Pharm. J. Trans., 

 1883. 



{a) HYMENODICTYONINE A. (Hymenodictine), C.^H^oX, ; 'requires further 

 study' (Hiisemann); amorphous or needles; M.P. liO' ; non-fluorescent, 

 reaction alkaline, taste bitter. Salts amorphous. 



Soluble in alcohol, ether, chloroform, benzene, petroleum ether; diffi- 

 cultly in water. 

 Precipitants : 



Alkaline hydrates / pp. gelatin- Phnspho-molybdic acid, yellow. 

 Ammonia ( ous. Potassium iodide. 



Tannic acid, brown. lodo-potassium iodide, brown. 



Picric acid, yellow. Bismuth-potassium iodide, red. 



Platinum chloride. Cadmiumpotas.'iium iodide. 



Potassium ferrocyanide. Mercuric-potassiumiodide,white. 



„ ferricyanide. Mercuric chloride. 



,, sulphocyanide in ex- Also by sodium phosphate. 



cess, oily drops. „ „ chloride. 



„ bichromate. „ „ nitrate. 



(/;) A inter jfrinriplf, C.,,,U.^,fl^; neutral. 

 Slightly soluble in hot alcohol. Insoluble in ether or chloroform. 



§ 12(i. ILEX aquifolium (Holly), .lf/«(7c//o'(>(i. The leaves. 



[For Ilex Paraguayensis containing Theine see Thea group.] 



((t) ILIXANTHIN, a colouring matter ; CirH...,0„ ; pale yellow micro- 

 scopic needles ; M.P. 198' ; non-sublimable, nou-glucosidal. 



Soluble in hot water and alcohol, scarcely in cold water, not in ether. 



Reactions : Alkaline hydrates, orange pp. 

 Lead acetate, neutral or basic, yellow pp. 

 [Fehling's solution not reduced.] 



(i) ILICIN B. Concerning this substance the statements of various 

 investigators are discordant. 



§ 127. ILLICIUM religiosum ('Sikimi'); MagnolktceK. The seeds. 

 Investigator : Eyckman, Pharm. J. Trans., 1881, 1,060. 



SIKIMIN B. Nitrogen free ; crystallizes in stellate prisms ; the hydro- 

 chloric acid compound has M.P. 17.-| : non-glucosidal. 



Soluble in hot water, alcohol, ether, chloroform, glacial acetic acid ; 

 with difficulty in cold water (not in petroleum ether ?). 



Reactions : 



Alkaline hydrates / • , , , 

 . ■ •' > insoluble. 



Ammonia ) 



[Not precipitated bj' neutral lead acetate.] 



