The organic constituents of plants and vegetable substances and their chemical analysis / by G.C. Wittstein ; authorised translation from the German original, enlarged with numerous additions, by Baron Ferd. von Mueller.

  • Wittstein, Georg Christian, 1810-1887.
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: The organic constituents of plants and vegetable substances and their chemical analysis / by G.C. Wittstein ; authorised translation from the German original, enlarged with numerous additions, by Baron Ferd. von Mueller. Source: Wellcome Collection.

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    206-225° and rectifying until of a constant boiling point. The solid form appears in white laminae, smells more faintly and plea- santly than anis-oil, fuses at 16°, boils at 220°, has at 12° a density of 1-044, at 25° a density of 0-984. The liquid form from fennel-oil does not congele at-10° and boils at 225°; the liquid from Tarragon-oil boils at 206°. Allg'elic Acid = Cio H7 O3 + HO. Ingi-edient of the root of Angelica Archangelica, of the Sumbul root (from Euryangium Sumbul) and also of the essential oil of the flowers of An- themis nobilis, the less volatile part of which in boiling with alcoholic solution of caustic potash secedes into angelate and valerate of potassa. It volatilises with the steam by distil- ling the roots of Angelica with water, but may be obtained more completely by boiling the roots with milk of lime, perco- lating, concentrating the liquid and distilling with sulphuric acid. The distillate has to be saturated with carbonate of soda; is then evaporated, again distilled with sulphuric acid and kept in the cold for some days. Collect the crystals, wash with cold water and re-crystallise. It forms translucent, colourless prisms and needles of peculiarly aromatic smell, and very acid, burning and aromatic taste; fuses at 45°, and boils at 190°; dissolves slowly in cold, most readily in hot water, alcohol and ether. Its salts are mostly soluble in water; the lead, silver and copper salts slowly; the oxyd of iron salt is insoluble. Ang'elicin. Crystalline resin of the root of Angelica Arch- angelica. The alcoholic tincture of the above root separates in evaporating into two liquids of different density, the denser one being aqueous of light-yellow colour, and containing much sugar; the lighter supernatant one brown and resinous. The latter has, after washing with water, to be saponified by caustic potash; this is dissolved in alcohol, subjected to carbonic acid, evaporated and treated with ether, which dissolves Angelicin and leaves it pure after evaporating. Fine, colourless needles, without smell; of at first imperceptible, afterwards burning and aromatic taste, easily fusible, not volatile, soluble in alcohol and in ether. [Ac- cording to the latest researches of B. Brimmer, Angelicin has been found to be identical with Hydrocarotin.] AllgUSturin. In the genuine Angustura bark from Galipea officinalis and G. Cusparia. Obtained by extracting with alcohol and evaporating. Fine, white crystals of a bitter and faintly acrid taste, little soluble in water, more in alcohol and in acids, not in ether and volatile oils; is precipitable by tannic acid. Anime, Exudation of the stem of Bursera gummifera and Trachylobium Homemanni. Yellow, transparent, of pleasant smell, especially on warming, and of mastic-like taste; softens in the