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]IIelitOSe=:Ci2 Hu On 4- 3 HO. Distinct sweet matter of the 

 peculiar manna of various kinds of the genus Eucalyptus. 

 Crystallises, on evaporating the aqueous solution of the manna, and 

 is purified with animal charcoal. From water Melitose crystallises 

 in felted needles, from alcohol in well-formed but small crystals ; 

 it has a slightly sweet taste, loses at 100° 2 equivalents water, at 

 130° another eq., while evolving a peculiar odour and becoming 

 anhydrous and of the appearance of a pale-yellow translucent mass ; 

 it fuses on rapidly heating to 94° to 100° under loss of ir237o 

 (.5 eq.) water, smells like caramel, when heated to a higher tem- 

 perature, and is afterwards carbonised; dissolves in water almost 

 like mannit; in hot alcohol more extensively than mannit, yields 

 with nitric acid a little mucic and more oxalic acid, separates on 

 heating with diluted sulphuric acid into equal pai'ts fermentable 

 and unfermentable sugars (the latter called by Berthelot Eucalin = 

 Ci2 Hi2 O12) ; yields with yeast half as much alcohol and carbonic 

 acid as grape-sugar; is not altered on boiling with alkalies, alkaline 

 earths or alkaline tartarate of copper; is precipitated by ammoniacal 

 acetate of lead. 



Meloil61lietill. Emetic ingredient of the root of Cucumis 

 Melo, obtained in the impure state by treating the aqueous 

 extract with alcohol and evajiorating the tincture to dryness. — 

 Brown, hard, glossy, deliquescent mass; tastes acrid and some- 

 what bitter; dissolves most readily in water, alkalies and alcohol, 

 but not so well in strong alcohol; not in ether, acetic acid and oils. 



Meuispei'lllill = C^e H24 NO 4 . Alkaloid of the seed-husks of 

 Cocculus indicus of Anamirta paniculata. Exhau.st the contused 

 husks with boiling alcohol of 36° B., filter, distil off the alcohol, with- 

 draw from the residue picrotoxin by means of boiling water and after- 

 wards the Menisjsermin and paramenispermin by acidulated water; 

 precipitate the latter two bases with ammonia, dissolve the deposit in 

 diluted acetic acid, precipitate again with ammonia, dry the 

 deposit, draw out with alcohol and allow the solution to evaporate 

 spontaneously, whereby a yellow alkaline resin with crystals of 

 Menispermin and a yellowish slimy mass are obtained. Pick 

 out the crystals as well as possible, remove from the yellow 

 gelatinous mass the i-esin by means of cold alcohol, aftei'wards, by 

 rinsing with cold ether, the rest of the Menispermin, which 

 i-eraains after the evaporation of the ether, and purify all the 

 crystals obtained by rinsing with cold alcohol. The yellowish 

 slime, dissolved in absolute alcohol, yields, after evaporating, 

 paramenispermin. — Forms white, half-ti-anslucid, quadratic 

 prisms, similar to cyanide of mercuiy; tasteless; fuses at 120°, and 

 is destroyed in higher temperatures; is insoluble in water, soluble 

 in alcohol, ether and diluted acids, foi-ming salts with the latter, 

 which are precipitable by alkalies. 



