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small, spotted cats found in Africa, Southern Asia, and the East Indies; esp., Felis Bengalensis. -- Leopard marmot. See Gopher, 2.

which is more than ordinarily flattened in the center; also, a species of convexoconcave lens for spectacles.

ear larger than they really are; to increase the apparent dimensions of objects; as, some lenses magnify but little.

An optical apparatus in which pictures are viewed through a large lens with stereoptical effects. It is often combined with the stereoscope.

A lens convex on one side and concave on the other.

any kind of goods or wares; now restricted to a dealer in textile fabrics, as silks or woolens. [Eng.]

two images of an object are formed in the field, usually by the two halves of a bisected lens which are movable along their line of section by a screw, and distances are determined by the number of screw revolutions necessary to bring the points to be measured into optical coincidence. When the two images are formed b…

the magnified image of an object formed by a microscope or other suitable combination of lenses.

An optical instrument, consisting of a lens, or combination of lenses, for making an enlarged image of an object which is too minute to be viewed by the naked eye. Compound microscope, an instrument consisting of a combination of lenses such that the image formed by the lens or set of lenses nearest the object (called…

s of alchemy. [Obs.] Multiplying gear (Mach.), gear for increasing speed. -- Multiplying lens. (Opt.) See under Lens.

ally converged so as to produce a distinct image. It is corrected by the use of a concave lens.

, or is considered to be directed; as, the object of a transitive verb. Object glass, the lens, or system of lenses, placed at the end of a telescope, microscope, etc., which is toward the object. Its office is to form an image of the object, which is then viewed by the eyepiece. Called also objective. See Illust. of M…

ular name. Called also dancing girls. -- Opera glass, a short telescope with concave eye lenses of low power, usually made double, that is, with a tube and set of glasses for each eye; a lorgnette; -- so called because adapted for use at the opera, theater, etc. -- Opera hat, a gentleman's folding hat. -- Opera hous…

holtz for measuring the size of a reflected image on the convex surface of the cornea and lens of the eye, by which their curvature can be ascertained.

a mirror (usually concave) and the interior is then examined with or without the aid of a lens. -- Oph*thal`mo*scop"ic, a.

tincts vision in different individuals, and thus determiming the proper focal length of a lens for correcting imperfect sight. Brande & C.

ther than the use of drugs, for the measurement of the powers of vision and adaptation of lenses for the aid thereof."

oramic view of the horizon. The photographic plate is placed horizontally with a vertical lens above. A mirror of peculiar shape reflects light from the entire horizon to the lens, by means of which it is focused upon the plate.

An example of a conjugation or declension, showing a word in all its different forms of inflection.

sides. Periscopic spectacles (Opt.), spectacles having concavo-convex or convexo-concave lenses with a considerable curvature corresponding to that of the eye, to increase the distinctness of objects viewed obliquely.