14 



206-225° and rectifying until of a constant boiling point. The 

 solid form appears in white laminse, 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°. 



Angelic Acid = Cio H7 O3 + HO. Ingredient of the root of 

 Angelica Ai-changelica, of the Sumbul root (from Euiyangium 

 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. 



Angelicill, 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 -svith 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. 



Aniinet Exudation of the stem of Bursera gummifera and 

 Trachylobium Hornemanni. Yellow, transparent, of pleasant smell, 

 especially on warming, and of mastic-like taste; softens in the 



