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Magnet. [Obs.] Spenser.

A light earthy white substance, consisting of magnesium oxide, and obtained by heating magnesium hydrate or carbonate, or by burning magnesium. It has a slightly alkaline reaction, and is used in medicine as a mild antacid laxative. See Magnesium. Magnesia alba Etym: [L.] (Med. Chem.), a bulky white amorphous substance…

Pertaining to, characterized by, or containing, magnesia or magnesium. Magnesian limestone. (Min.) See Dolomite.

Pertaining to, or containing, magnesium; as, magnesic oxide.

Native magnesium carbonate occurring in white compact or granular masses, and also in rhombohedral crystals.

le, quite permanent in dry air but tarnishing in moist air. It burns, forming (the oxide) magnesia, with the production of a blinding light (the so-called magnesium light) which is used in signaling, in pyrotechny, or in photography where a strong actinic illuminant is required. Its compounds occur abundantly, as in do…

A hydrous carbonate of magnesia occurring in white, early, amorphous masses.

Nitrate of magnesium, a saline efflorescence closely resembling nitrate of calcium.

Any substance which absorbs and neutralizes acid fluid in the stomach and bowels, as magnesia, chalk, etc.; also a substance e. g., iodine) which acts on the absorbent vessels so as to reduce enlarged and indurated parts.

A kind of plastic cement, or artificial stone, consisting chiefly of magnesia and silica; -- called also albolite.

hese salts is mainly soda with a smaller amount of potash, and usually a little lime and magnesia. Two main classes of alkali are commonly distinguished: black alkali, which may be any alkaline carbonate, but which practically consists of sodium carbonate (sal soda), which is highly corrosive and destructive to vegeta…

perties of an alkali. Alkaline earths, certain substances, as lime, baryta, strontia, and magnesia, possessing some of the qualities of alkalies. -- Alkaline metals, potassium, sodium, cæsium, lithium, rubidium. -- Alkaline reaction, a reaction indicating alkalinity, as by the action on limits, turmeric, etc.…

ucture. The color varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite, actinolite, asbestus, edenite, hornblende (the last name being also used as a general term for the whole species). Amphibole is a constit…

A blasting powder or dynamite composed of nitroglycerin, wood fiber, sodium nitrate, and magnesium carbonate.

Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.

lant of the genus Cardamine, esp. C. amara. -- Bitter earth (Min.), tale earth; calcined magnesia. -- Bitter principles (Chem.), a class of substances, extracted from vegetable products, having strong bitter taste but with no sharply defined chemical characteristics. -- Bitter salt, Epsom salts;; magnesium sulphate.…

A common name of dolomite; -- so called because it contains magnesia, the soluble salts of which are bitter. See Dolomite.

ins in salt works after the salt is concreted, having a bitter taste from the chloride of magnesium which it contains.

A hydrous sulphate of magnesium and sodium.

n medicine. It is composed essentially of hydrous silicates of alumina, or more rarely of magnesia. See Clay, and Terra alba.