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vomiting, retching, thirst, difficulty of breathing, convulsions, anddeath. No test has been discovered.Antidotes are emetics, mucilaginous drinks, and emollient enemata ;and venesection, if inflammatory symptoms supervene.

Brionin. A crystallizable principle found in white bryony procuredby treating the expressed juice with ammonia. (Vauquelin.)

Brionv (Black). Tamus communis. A native plant, said to be diu-retic, but little used.

British Oil. Boil together Jj of camphor, ^iv of rectified spirit ofwine, ^xij of sweet oil, and Jv of oil of hartshorn.

Brodum's Nervous Cordial is prepared by mixing together equalquantities of compound spirit of lavender, wine of iron, and of thetinctures of gentian, calumba, cardamoms, and Peruvian bark.

Bromates are salts formed by bromic acid similar to the chlorates andiodates. Bromate of potass is distinguished from the iodate orchlorate of potass, by its not precipitating the salts of lead, and byits giving a white precipitate with nitrate of silver, and a yellowishwhite with proto-nitrate of mercury.

Bromic Acid is obtained by decomposing a dilute solution of bromate 0 fbaryta with sulphuric acid, so as to precipitate the whole of thebaryta. This is concentrated by evaporation to the consistence ofsyrup; but it has not hitherto been procured anhydrous.It is similarly constituted with the iodic, chloric, and nitric acids. Ithas little smell, but tastes very acid, though it is not corrosive.

Brome, or Bromine. New. A substance very recently (1826) dis-covered by M. Ballard of Montpellier. It is procured by trans-mitting a current of chlorine gas through bittern, and then agitatinga portion of sulphuric ether with the liquid. This is then agitatedwith caustic potass, which produces hydro-bromate of potass uponevaporation, whence the bromine is set free by means of chlorine andheat.It appears to be an elementary substance very similar to chlorine andiodine. It is easily detected by means of chlorine, which separatesit from most of its combinations. Its solution in ether, which is ofa fine hyacinth red, is also a good characteristic. It freezes at4° Fahrenheit.

Bromurets are combinations of Bromic acid with iodine, phosphorus,sulphur, &c.

Broom. See Spartium and Genista.

Browning to colour and flavour meat and made dishes. Beat topowder jiv of double-refined sugar, and put into a very cleaniron frying-pan with §j of fresh butter, mix it well over a clear fire,and as it begins to froth hold it higher up. When it is of a very