s of mussel abundant among the rocks of
the western islands of Scotland and Wales.

MADE. A professional term for having obtained a commission, or being
promoted. Also, in some points synonymous with _built_. (_See_ MADE
MASTS, &c.)

MADE-EYE. Synonymous with _Flemish eye_ (which see).

MADE MASTS. The large masts made in several pieces. A ship's lower mast
is a made spar; her top-mast is a whole spar.--_Made block_ is one
having its shell composed of different pieces.

MADRIERS. Long and broad planks, used for supporting the earth in
mining. Also, an old term for sheathing.

MAGAZINE. A place built for the safe-keeping of ammunition; afloat it is
confined to a close room, in the fore or after part, or both, of a
ship's hold, as low down as possible; it is lighted occasionally by
means of candles fixed in the light-room adjoining it, and no person is
allowed to enter it with a lamp or candle. (_See_ LIGHT-ROOM.)

MAGELLANIC CLOUDS. A popular term for the two _Nubeculae_, or great
cloudy-looking spots in the southern heavens, which are found to consist
of a vast number of nebulae and clusters of stars.

MAGELLAN JACKET. A name given to a watch-coat with a hood, worn in high
latitudes--first used by Cook's people.

MAGGED. Worn, fretted, and stretched rope, as a magged brace. Also,
reproved.

MAGNET. _See_ COMPASS.

MAGNETIC AMPLITUDE. The angle between the east or west point of a
compass and any heavenly body at its rising or setting.

MAGNETIC AZIMUTH. An arc of the horizon intercepted between the azimuth
circle of a celestial object and the magnetic meridian.

MAGNETIC COMPENSATOR. An iron plate fixed near the compass, to
neutralize the effect of local attraction upon the needle.

MAGNETIC NEEDLE. Applied to theodolites, ships' compasses, &c. A
balanced needle, highly magnetized, which points to the magnetic pole,
when not influenced by the local attraction of neighbouring iron. The
magnetism may be discharged by blows, or a fall; hence, after an action
at sea, the needles are often found to be useless, until re-magnetized.

MAGNETIC STORM. An extraordinary magnetic action indicated by delicate
magnetometers in a magnetic observatory, not perceptible on ordinary
magnets.

MAGNETIC TELEGRAPH. An instrument for communicating messages by means of
magnetism.

MAGNITUDE OF AN ECLIPSE. The proportion which the eclipsed part of the
surface of the sun or moon bears to the diameter; it is sometimes
expresse