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ecipitation from its solutions. It absorbs oxygen to a high degree, and is employed as an oxidizer. -- Platinum lamp (Elec.), a kind of incandescent lamp of which the luminous medium is platinum. See under Incandescent. -- Platinum metals (Chem.), the group of metallic elements which in their chemical and physical pr…

. Primary alcohol (Organic Chem.), any alcohol which possess the group CH2.OH, and can be oxidized so as to form a corresponding aldehyde and acid having the same number of carbon atoms; -- distinguished from secondary and tertiary alcohols. -- Primary amine (Chem.), an amine containing the amido group, or a derivativ…

allic state by separating from impurities; hence, in general, to remove oxygen from; to deoxidize; to combine with, or to subject to the action of, hydrogen; as, ferric iron is reduced to ferrous iron; or metals are reduced from their ores; -- opposed to Ant: oxidize.

To contract rust; to be become oxidized. If gold ruste, what shall iron do Chaucer. Our armors now may rust. Dryden.

ich it is produced by the process of nitrification (see Nitrification, 2). It is a strong oxidizer, is the chief constituent of gunpowder, and is also used as an antiseptic in curing meat, and in medicine as a diuretic, diaphoretic, and refrigerant. Chili salpeter (Chem.), sodium nitrate (distinguished from potassium n…

gyrite, ceragyrite, etc. Silver is one of the "noble" metals, so-called, not being easily oxidized, and is used for coin, jewelry, plate, and a great variety of articles. Symbol Ag (Argentum). Atomic weight 107.7. Specific gravity 10.5.

n salt, in albite, etc. It is isolated as a soft, waxy, white, unstable metal, so readily oxidized that it combines violently with water, and to be preserved must be kept under petroleum or some similar liquid. Sodium is used combined in many salts, in the free state as a reducer, and as a means of obtaining other meta…

anufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.

line metal, malleable at ordinary temperatures, but brittle when heated. It is not easily oxidized in the air, and is used chiefly to coat iron to protect it from rusting, in the form of tin foil with mercury to form the reflective surface of mirrors, and in solder, bronze, speculum metal, and other alloys. Its compoun…

also vinegar worm. -- Vinegar lamp (Chem.), a fanciful name of an apparatus designed to oxidize alcohol to acetic acid by means of platinum. -- Vinegar plant. See 4th Mother. -- Vinegar tree (Bot.), the stag-horn sumac (Rhus typhina), whose acid berries have been used to intensify the sourness of vinegar. -- Wood…

fusible bluish white metal, which is malleable, especially when heated. It is not easily oxidized in moist air, and hence is used for sheeting, coating galvanized iron, etc. It is used in making brass, britannia, and other alloys, and is also largely consumed in electric batteries. Symbol Zn. Atomic weight 64.9 [Forme…