Iron, Sesqui-Chloride of.—Perchloride of iron or permuriate of iron. Made by dissolving rust of iron in muriatic acid and then crystalizing. It forms red crystals. Soluble in water, alcohol and ether. Very corrosive.
Logwood.—The wood of a tree growing in Central America. The extract is used in dyeing black color.
Madder.—A plant of the genus Rubia, one species of which is used in dyeing red.
Manganese, Sulphate of.—A beautiful rose-colored salt, used to give a fine brown dye.
Mastic.—A resin exuding from the mastic tree. It is in yellowish-white, semi-transparent tears. Used as an ingredient in varnishes.
Mercury, Quicksilver.—A metal fluid at ordinary temperatures. Congealable at about 40° below zero. Boils at 660° and forms a colorless dense vapor. It is used in barometers and thermometers, and in alloy with tin in coating mirrors. It unites with chloroform, forming calomel and corrosive sublimate. The only acids that act on it are sulphuric and nitric. To unite with the latter it must be heated.
Mercury, Chloride of.—See Chloride of Mercury.
Mercury, Horn.—Called Chloride of Mercury.
Mercury, Muriate of.—Chloride of Mercury.