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portion of a graduated instrument, as a quadrant or astrolabe, carrying the sights or telescope, and showing the degrees cut off on the arc of the instrument Whewell.

To render larger, more extended, or more intense, and the like; -- used especially of telescopes, microscopes, etc.

The part of a polariscope which receives the light after polarization, and exhibits its properties.

The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.

and it is by taking advantage of this fact that the best aplanatic object glasses of microscopes are constructed.

Relating to the casting of horoscopes. [Archaic] Whewell.

To come near to; to approach. The telescope approximates perfection. J. Morse.

Extent; scope; range; as, a wide area of thought. The largest area of human history and man's common nature. F. Harrison. Dry area. See under Dry.

The horoscope, or that degree of the ecliptic which rises above the horizon at the moment of one's birth; supposed to have a commanding influence on a person's life and fortune.

Examination of the ear by the aid of the auriscope.

(immediate auscultation) applied to parts of the body, as the abdomen; or with the stethoscope (mediate ~), in order to distinguish sounds recognized as a sign of health or of disease.

ight line passing through its center and perpendicular to its surfaces. -- Axis of a telescope or microscope, the straight line with which coincide the axes of the several lenses which compose it. -- Axes of coördinates in a plane, to straight lines intersecting each other, to which points are referred for the purpos…

Pertaining to, or determined by, the baroscope.

A thermal cymoscope which operates by increased resistance when subjected to the influence of electric waves. The original form consisted of an extremely fine platinum wire loop attached to terminals and inclosed in a small glass or silver bulb. In a later variety, called the liquid barretter, wire is replace by a colu…

A dioptric telescope, fitted with two tubes joining, so as to enable a person to view an object with both eyes at once; a double- barreled field glass or an opera glass.

Adapted to the use of both eyes; as, a binocular microscope or telescope. Brewster.

sively; to extend one's discourse to other topics than the main one; also, to enlarge the scope of one's business, etc. To branch out into a long disputation. Spectator.

A concave tool used in grinding lenses or the speculums of telescopes. Knight.

on the other hand, had never gone through an experience calculated to lead him beyond the scope of generally received laws. Hawthorne.

canvas, so that the outlines may conveniently traced. It is generally used with the microscope.