Antimony, Butter of.—See Antimony, Chloride of.
Aqua Fortis.—Called also Nitric Acid, which see.
Aqua Regia.—Made by mixing one part nitric acid in two muriatic acid, by measure; keep the mixture in a bottle in a cool, dark place.
Asphaltum.—Native bitumen, will dissolve in turpentine with gentle heat.
Benzoin, Gum or Gum Benjamin.—A gum extracted from the tree, Styrax benzoin, which grows in the East Indies. It fuses at a gentle heat, can be dissolved in alcohol and imperfectly dissolved in ether. It is employed as a varnish for toilet and other articles, which give out an agreeable smell when warmed by the heat of the hand.
Blue Vitriol.—Sulphate of copper. A salt formed by sulphuric acid in combination with copper. It is soluble in cold or warm water, used much in dyeing and exciting galvanic batteries.
Brimstone.—See sulphur.
Brimstone, Black.—Crude sulphur.
Burnt Umber.—Umber is a mineral of brown color from the Island of Cyprus. Two kinds are found in the market, raw and burnt.
Butter of Antimony.—See antimony, chloride of.