ODON

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Nut Oil is prepared by expression from filberts, or hazel-nuts; and, asit is without smell, it is much used in perfumery, as a substitute foroil of ben, and also by painters for mixing their colours.

Nux Moschata. See Myristics: Nuclei.

Nux Vomica. P. The fruit of the Strychnos nux vomica, D. Rats-bane, or Poison-nut. The wood is also used. Nux vomica is abitter tonic and stimulant, with a tendency to affect more particularlythe spinal marrow and its nerves. It is also vermifuge and emmena-gogue. It is given in doses of gr. ij to 3j, cautiously increasing thedose in mania, epilepsy, chorea, paralysis, taenia, amenorrhea; aswell as in scrofula, gout, syphilis, &c.It contains Strychnine and Brucine, which see.Poisonous in large doses, producing feelings similar to tipsiness, giddi-ness, nausea, vomiting, retching, thirst, spasms, and cramps of thelimbs, oppressed breathing, fainting, coma, and death. The besttreatment is to promote vomiting, and even to give a vomit of sul-phate of copper instantly. Copious draughts of vinegar and water,or any other vegetable acid, will also do good; and if there is muchstupor, the affusion of cold water may be tried. There is no test yetdiscovered for it.Employed to adulterate spirituous and malt liquors; and enters intomost of the compositions sold under various names by brewers'druggists.

Nymph^ea. P. The Waterlily. The roots of several species of which,such as the N. alba, and N. lutea, are used medicinally, as aromaticastringents and refrigerants. The dose is jss to 5J of the distilledwater. A syrup is also made of the flowers, which is said to beantaphrodisiac, but this is not probable.

O.

Oak Bark. See Quercus Cortex.

Oak (Poison). See Toxicodendri Folia.

Oats. See Aven.s: Semina.

Ochre. A general term applied to pulverulent clays. It is nearlysynonymous with the term Bole. Red ochre and Yellow ochre arethe chief, and ought to be chosen of a fine colour, as free from sandyor gritty matter as possible. The colours chiefly depend on the pre-sence of an oxide of iron, or some other metal.

Oculi Cancroruji. Crabs' Eyes. See Cancri Chel.e.

Odontalgic. A medicine which relieves or cures tooth-ache.

Odonton. A nostrum advertised as a dentifrice.