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n ancient times. Shak. -- Naked eye, the eye alone, unaided by glasses, or by telescope, microscope, or the like. -- Naked-eyed medusa. (Zoöl.) See Hydromedusa. -- Naked flooring (Carp.), the timberwork which supports a floor. Gwilt. -- Naked mollusk (Zoöl.), a nudibranch. -- Naked wood (Bot.), a large rhamnaceous…

ass in a series of groups of different closeness of line, and used to test the power of a microscope.

." Massinger -- Nose piece, the nozzle of a pipe, hose, bellows, etc.; the end piece of a microscope body, to which an objective is attached. -- To hold, put, or bring one's nose to the grindstone. See under Grindstone. -- To lead by the nose, to lead at pleasure, or to cause to follow submissively; to lead blindly,…

les in rouleaux, like piles of coins, as when a drop of human blood is examined under the microscope.

tive 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 Microscope. -- Object lesson, a lesson in which object teachi…

The eyepiece of an optical instrument, as of a telescope or microscope.

ydrogen; as, oxyhydrogen gas. Oxyhydrogen blowpipe. (Chem.) See Blowpipe. -- Oxyhydrogen microscope, a form of microscope arranged so as to use the light produced by burning lime or limestone under a current of oxyhydrogen gas.

o mounted that they may be interchanged without varying the focus of the instrument (as a microscope or telescope) with which they are used.

gulatum has very fine striations, and is a favorite object for testing the high powers of microscopes.

scales with which the body of a podura is covered. They are used as test objects for the microscope.

lens, mirror, or any optical instrument, magnifies; in the telescope, and usually in the microscope, the number of times it multiplies, or augments, the apparent diameter of an object; sometimes, in microscopes, the number of times it multiplies the apparent surface.

ally signifying an instrument for viewing (with the eye) or observing (in any way); as in microscope, telescope, altoscope, anemoscope.

sheet, wall, etc., upon which an image, as a picture, is thrown by a magic lantern, solar microscope, etc.

c lantern, stereopticon, or the like; a plate on which is an object to be examined with a microscope.

ers which open and shut daily at certain hours. -- Solar lamp, an argand lamp. -- Solar microscope, a microscope consisting essentially, first, of a mirror for reflecting a beam of sunlight through the tube, which sometimes is fixed in a window shutter; secondly, of a condenser, or large lens, for converging the beam…

The platform of a microscope, upon which an object is placed to be viewed. See Illust. of Microscope.

weight of from two hundred and fifty to three hundred pounds, -- used in weighing pitch. Microscope stand, the instrument, excepting the eyepiece, objective, and other removable optical parts. -- Stand of ammunition, the projectile, cartridge, and sabot connected together. -- Stand of arms. (Mil.) See under Arms. -…

t it may be used as an observing telescope for objects close at hand or as a long-focused microscope.

nd. Blackstone. -- Test object (Optics), an object which tests the power or quality of a microscope or telescope, by requiring a certain degree of excellence in the instrument to determine its existence or its peculiar texture or markings. -- Test paper. (a) (Chem.) Paper prepared for use in testing for certain subst…

ing striæ, and corresponds to the cell wall of an ordinary cell. See Ovum, and Illust. of Microscope. (b) The zona radiata. -- Zona radiata Etym: [NL.] (Biol.), a radiately striated membrane situated next the yolk of an ovum, or separated from it by a very delicate membrane only.