ADDENDA. 



ACONITUM (compare p. 1). Dunstan and Carr (C'Jiem. Soc. Jnl., Aug., 

 18',K5) show that Aconitine changes into Isaoonitine under certain condi- 

 tions, c.fi., long heating of the hydrobroraide. Dunstan and Jowett, 

 loc. cil., further show that Aconitine Aurichloride exists in three modifi- 

 cations, having different melting-points. 



BRYONIA. Masson (./. Pharm., [.5], 27, 300) finds tor BRYONIN : 

 CjiHjkO,, ; dextro-rotatory, [a]i)= -|-41':?5 ; precipitated by ammoniacal 

 lead acetate ; and for BRYOGENIN : Ci.,Hi,jO. ; M.P. 210°; dextro-rotatory 

 (-|- 105'). Bryogenin dissolves with red colour in concentrated sulphuric 

 acid, the solution becoming purple on heating, and giving, on subsequent 

 addition of water, a purple pp. 



CANNABIS indica (Indian Hemp) ; Cannabinacece ; alkaloids, (a), see 

 Dupuj', ' Les alcaloides'; and (i), see H. F. Smith, Amer. J. Pharm. 



(o) CANNABINE A. ; crystallizes in needles ; 'action like Strychnine.' 

 Soluble in alcohol, very readily in water, slowly in ether and chloro- 

 form. 



' Precipitates with most alkaloid reagents.' Xo violet coloration with 

 sulphuric acid and potassium bichromate. 



(Ii) CANNABININE A. ; yellowish-green, amorphous (varnish from ether); 

 Coniine-like odour ; alkaline reaction. Gives a crystalline sulphate. 

 Soluble in alcohol and in ether ; very difficultly in water. 

 Precipitants 



Alkaline hydrates ) yellowish- 

 Ammonia I green. 

 Tannic acid, yellowish-brown. 

 Picric acid, yellow. 

 Phospho-niolybdic acid, white. 



Potassic iodide, yellow, 

 lodo-potassic iodide, yellowish- 

 brown. 

 Mercuric-potassic iodide, white. 



CERBERA (see p. 2(5) and STROPHANTHUS (p. H:^). P. C. Plugge 



{Anli. Pharm., 231, 10-34, and Chem. Hor. Jul., 54, i., 481) describes under 



the name ' CERBERIN ' a glncoside resembling Arnaud's TANGHININ (p. 93); 

 Co,H.|oO„ ; M.P. rjP-192° (corrected). Lffivo-rotatory : [a]D= -74-(')l in 

 90 per cent, alcohol. 



Soluble in alcohol, chloroform, ether, .amyl alcohol ; with difficulty 

 in benzene and carbon tetrachloride, slightly in carbon bisulphide and 

 petroleum ether. 



CONVOLVULACE.S; (compare p. 44). N. Kromer {Pharm. Z. Rush., 

 vols. 31 and 3.2) has obtained the following results : 



SCAMMONIN (Jalapin), CbsHimOjs ; M.P. 123-08° (corrected) ; Isevo- 

 rotatory, [a]D= -23-06. 



Insoluble in petroleum ether and water. Behaviour to other solvents 

 as given on p. 44. 



TURPETHIN, C;,;Hi.„0;„., ; M.P. 1468' (corrected). 



TURPETHOL (Turpethole), d.HsoOs ; M.P. 85-7G° ; the anhydride 

 apparently of TURPETHOLIC ACID, CiuHsoOj. 



IPOMdIN G., from Ipomcea pandurata (Convolvulus panduratus, L.), 

 C;„Hi;aO,„; ; a white powder ; M.P. 170°. 



Soluble in most solvents except ether. 



Sodic hydrate colours it intense red ; red coloration also with sulphuric 

 acid (concentrated). 



IPOMEOLIC ACID (a crystalline substance, M.P. 6(J-6°) is formed by the 

 action of dilute acids U]ion the preceding body, together with sugar and a 

 volatile acid, C,H„Oo ; M.P. 00-8°. 



RITBIA tinctoria (Madder). Schunk and Marcblewski {Chem. Soc. 

 Jnl., Aug., 1893) have isolated a new substance, RUBIADIN-GLUCOSIDE, 

 occurring in lemon-yellow microscopic needles ; M.P. about 270°. 

 Decomposed by acids into sugar and Huhiadin, the methyl derivative of 

 Purpuroxanthin (isomer of Alizarin). 



