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ecies of electricity present, as by means of pith balls, and the like. Condensing electroscope (Physics), a form of electroscope in which an increase of sensibility is obtained by the use of a condenser.

An instrument for examining the interior of the rectum, the urethra, and the bladder.

A kind of reflecting microscope. [Obs.]

A kind of firearm; a carbine.

A group which includes the typical copepods and the lerneans.

An instrument for observing or exhibiting fluorescence.

An instrument or apparatus for detecting the presence of electrical currents, especially such as are of feeble intensity.

An apparatus for detecting the presence of any dangerous gas, from a gas leak in a coal mine or a dwelling house.

An instrument for viewing or examining the interior of the stomach.

See Graphoscope.

An optical instrument for magnifying engravings, photographs, etc., usually having one large lens and two smaller ones.

, etc. It was devised by Professor W. R. Johnson, in 1832, by whom it was called the rotascope.

A hæmoscope.

An instrument devised by Hermann, for regulating and measuring the thickness of a layer of blood for spectroscopic examination.

An opening made in the interior walls of a cruciform church to afford a view of the altar to those in the transepts; -- called, in architecture, a squint. Hook.

An instrument for exhibition or illustration of the phenomena of halos, parhelia, and the like.

A telescope or instrument for viewing the sun without injury to the eyes, as through colored glasses, or with mirrors which reflect but a small portion of light. -- He`li*o*scop`ic, a.

The representation made of the aspect of the heavens at the moment of a person's birth, by which the astrologer professed to foretell the events of the person's life; especially, the sign of the zodiac rising above the horizon at such a moment.

One versed in horoscopy; an astrologer.

An instrument designed to mark the presence of water, especially in air. Weale.