to stain marble; by dairy-farmers, to colour cheese; by wine-merchants and bottlers (in the form of tincture), to stain beforehand the corks of their port-wine bottles, in order to imitate the effects of age, and as colouring and flavouring for factitious port wine; and by dyers, and others. A species of crimson rouge was formerly prepared from it (hence its name).
ALLANTO′IC ACID. See Allantoin.
ALLAN′TOIN. C8H6O6N4. Syn. Allanto′ic acid*, Amniot′ic a.† Am′nic a.†; Allantoï′na, L. A substance discovered by Vauquelin and Buniva in what they imagined to be the liquor amnii of the cow, and hence named by them amniotic acid. It was afterwards shown by Dzondi and Lassaigne to exist in the fluid of the allantoïs, and not of the amnios. It has since been produced artificially by Wöhler and Liebig.
Prep. 1. The allantoïc fluid of the fœtal calf is evaporated to 1-4th or 1-5th of its volume, and then set aside for some time. The crystals thus obtained are purified by re-solution, digestion with animal charcoal, and re-crystallisation.
2. (Wöhler and Liebig.) Uric acid, 1 part; is dissolved in water, 20 parts; and freshly precipitated and well-washed binoxide of lead is added to the solution until the colour ceases to change; the liquid is next filtered while hot, evaporated until a pellicle forms on the surface, and then set aside to crystallise; the crystals being purified as before.
Prop., &c. Small, but very brilliant prismatic, transparent, colourless crystals; tasteless; neutral; soluble in 160 parts of cold water, and in much less at 212°; nitric acid converts it into ALLANTURIC ACID; oil of vitriol resolves it into ammonia, carbonic acid, and carbonic oxide; hot concentrated solutions of the caustic alkalies change it into ammonia and oxalic acid.
ALLANTOX′ICUM. [L.] Syn. Allantox′icum, L. (prim., Gr.). The poison developed, during putrefaction, in sausages made of blood, liver, &c. “It often proves speedily fatal.” (Kraus.)
ALLGEMEINE FLUSSTINCTUR (Sulzberger, Salzungen). For the relief of a number of diseases, among which are cholera and sea-sickness. Aloes, 1 part; spirit of wine, 2 parts. (Spau.)
ALLIA′CEOUS (-sh′us). Syn. Allia′ceus, L.; Alliacé, Ailiacé, Fr.; Knoblauchartig, &c., Ger. Garlick-like; an epithet applied to substances having the odour or properties of garlic or onions.
Alliaceous Plants. Chives, garlic, leeks, onions, rocambole, shallots, &c.