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object is illuminated by means of a lamp, and its image is thrown upon a plate of ground glass connected with the instrument, or on a screen independent of it.

eful; woful; pitiable; as, a whining tone and a lugubrious look. Crossbones, scythes, hourglasses, and other lugubrious emblems of mortality. Hawthorne. -- Lu*gu"bri*ous*ly, adv. -- Lu*gu"bri*ous*ness, n.

The glassy base of an eruptive rock.

To have effect; to be of importance or significance. [Cant & Obs.] Spectator. Magnifying glass, a lens which magnifies the apparent dimensions of objects seen through it.

a having at one end a small convex mirror which reflects a beam of light on to the ground glass or photographic plate at the other end. The mirror is pivoted so that it can be moved in one direction by a small plunger operated by an elastic metal diaphragm which closes a tube connected with the engine cylinder. It is a…

her products) by hand, by machinery, or by other agency; as, to manufacture cloth, nails, glass, etc.

nder. -- Marsh samphire (Bot.), a plant (Salicornia herbacea) found along seacoasts. See Glasswort. -- Marsh St. John's-wort (Bot.), an American herb (Elodes Virginica) with small opposite leaves and flesh-colored flowers. -- Marsh tea. (Bot.). Same as Labrador tea. -- Marsh trefoil. (Bot.) Same as Buckbean. -- Ma…

A stone, or cast-iron plate, or former, on which hot glass is rolled to give it shape.

An ornamental border made of paper, pasterboard, metal, etc., put under the glass which covers a framed picture; as, the mat of a daguerreotype. Mat grass. (Bot.) (a) A low, tufted, European grass (Nardus stricta). (b) Same as Matweed. -- Mat rush (Bot.), a kind of rush (Scirpus lacustris) used in England for making m…

A round-bottomed glass flask having a long neck; a bolthead.

Having a dull surface; unburnished; as, matted gold leaf or gilding. Matted glass, glass ornamented with figures on a dull ground.

A dull, lusterless surface in certain of the arts, as gilding, metal work, glassmaking, etc.

A member of the scapolite, group, occuring in glassy crystals on Monte Somma, near Naples.

An instrument containing a combination of colored glasses such that they transmit only red light, so that objects of other colors, as green leaves, appear black when seen through it. It is used for viewing colored flames, to detect the presence of potassium, lithium, etc., by the red light which they emit.…

Glass in a state of fusion. Knight.

sparent forms are used in lanterns, the doors of stoves, etc., being popularly called isinglass. Formerly called also cat-silver, and glimmer.

ement given directly is that of the image of the object formed at the focus of the object glass. Circular, or Ring, micrometer, a metallic ring fixed in the focus of the object glass of a telescope, and used to determine differences of right ascension and declination between stars by observations of the times at which…

onitis in cattle; also, a variety of meningitis occurring in cows after calving. -- Milk glass, glass having a milky appearance. -- Milk knot (Med.), a hard lump forming in the breast of a nursing woman, due to obstruction to the flow of milk and congestion of the mammary glands. -- Milk leg (Med.), a swollen condit…

inite chemical composition and usually a distinct crystalline form. Rocks, except certain glassy igneous forms, are either simple minerals or aggregates of minerals.

nued heat in the air. It is used as a cement, as a paint, and in the manufacture of flint glass. Called also red lead.