11 



alkalies. When any of these solutions are boiled, the Aloin becomes 

 uncrystallisable. 



Aluclli-Resin, From an unknown tree of Madagascar. Almost 

 white on the outside, of black marble appearance on the inside, 

 opaque, solid, friable, of strongly aromatic, pepperlike smell and of 

 bitter taste. Contains volatile oil, a resin easily dissolving in 

 alcohol, another resin more difficvilt to dissolve in alcohol (the 

 latter crystalline to about 20%), an acid in the free state, an amor- 

 phous bitter substance and a salt of ammonia. 



Alyxia-Stereopten. Exudates on the inner surface of the 

 bark of Alyxia Rein ward ti.* White, hair-shaped crystals of the 

 odour of Cumarine, of faintly aromatic taste and of neutral reaction. 

 It sublimates afc 75°to 87°, fuses in higher temperatures and becomes 

 brown afterwards ; dissolves little in cold, better in warm water, 

 readily in alcohol, ether, acetic acid, oil of turpentine, caustic alka- 

 lies and carbonates of alkalies. 



Amanitiu. The alleged poisonous ingredient of the Fly- 

 Agaric (Agaricus muscarius), obtained as yet only as extract, con- 

 sequently impure. 



[Ambrosill. A fossil resin, exudation of probably coniferous 

 trees of South Georgia. Resembles amber, yields on melting suc- 

 cinic acid and a fragrant volatile oil. Dissolves copiously in oil of 

 turpentine, alcohol, ether, chloi'oform and carbonate of potash, in 

 less quantity and without decomposition in concentrated mineral 

 acids.] 



Ammonia cum. Gum- resinous exudation of Dorema ammo- 

 niacum. Yellowish white, half-transparent lumps, friable at low 

 temperature, of concheous fracture, disagreeable smell, faintly bitter 

 and acrid taste. Contains about 70% resin, soluble in alcohol and 

 solution of alkalies, 18 gum, 4 bassorin, and a light volatile oil. 



Amygdalin = C40 H27 ISr022 + 6 HO. Found in many plants 

 belonging to Rosacese, but its presence has been itartly deduced 

 from the fact, that these vegetables produce hydrocyanic acid, 

 when distilled with water. Amygdalin has been obtained in 

 two different modifications, viz., (a) in the crystalline form 

 from the seeds of Prunus Amygdalus, Prunus Persica, Prunus 

 domestica, Prunus Laurocerasus, Prunus Padus, and from the leaves, 

 flowers and bark of the latter; (b) in the amorjihous form from the 

 leaves of Prunus Persica and Prunus Laurocerasus and from the 

 seeds of Prunus Cerasus. Its presence has been deduced from the 

 hydrocyanic acid in the distillate of the following plants : — Prunus 

 capricida (leaves), Pr. spinosa (flowers and seeds), Pr. virginiana 

 (bark); Amelanchier vulgaris, Cotoneaster vulgai-is, Crataegus Oxya- 



* Doubtless also in others of the many Australian, Indian, and Polynesian speciea 

 known in the root of A. ruscifolia.— F. v. M. 



