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ich every circle in the plane is, in the theory of curves, imagined to pass. -- Circular polarization. (Min.) See under Polarization. -- Circular or Globular sailing (Naut.), the method of sailing by the arc of a great circle. -- Circular saw. See under Saw.

An American tree of the genus Populus or polar, having the seeds covered with abundant cottonlike hairs; esp., the P. monilifera and P. angustifolia of the Western United States.

Saturnian; -- applied to the North Polar Sea. [R.] Milton.

calcium carbonate, brought from Iceland, and used in certain optical instruments, as the polariscope. -- Rock crystal, or Mountain crystal, any transparent crystal of quartz, particularly of limpid or colorless quartz.

esistance of a particular kind of electric circuit, on the magnetization of steel, on the polarization of an electrolytic cell, or on the electric condition of a vacuum has been applied in the various cymoscopes.

The constellation of the Lesser Bear, to which, as containing the polar star, the eyes of mariners and travelers were often directed.

ily to their respective varieties of sugar. It is so named from its rotating the plane of polarization to the right; -- called also British gum, Alsace gum, gommelin, leiocome, etc. See Achroödextrin, and Erythrodextrin.

having the property of turning the plane of polarized light to the right; as, dextrotartaric acid.

Turning, or causing to turn, toward the right hand; esp., turning the plane of polarization of luminous rays toward the right hand; as, dextrorotatory crystals, sugars, etc. Cf. Levorotatory.

upy, or white crystalline, variety of sugar, C6H12O6 (so called from turning the plane of polarization to the right), occurring in many ripe fruits. Dextrose and levulose are obtained by the inversion of cane sugar or sucrose, and hence called invert sugar. Dextrose is chiefly obtained by the action of heat and acids o…

A body having diamagnetic polarity.

related to one another or to a magnet or armature common to both, that one coil produces polar action contrary to that of the other.

y lines drawn from the eye to two objects. -- Lunar distance. See under Lunar. -- North polar distance (Astron.), the distance on the heavens of a heavenly body from the north pole. It is the complement of the declination. -- Zenith distance (Astron.), the arc on the heavens from a heavenly body to the zenith of the…

equilibrium or in activity by a circuit movement, the fact of direction in which involves polarity, or opposition of properties in opposite directions; also, by attraction for many substances, by a law involving attraction between surfaces of unlike polarity, and repulsion between those of like; by exhibiting accumulat…

An exciting and depolarizing acid solution used in certain cells or batteries, as the Grenet battery. Electropoion is best prepared by mixing one gallon of concentrated sulphuric acid diluted with three gallons of water, with a solution of six pounds of potassium bichromate in two gallons of boiling water. It should be…

function. (Math.) See Function. -- Elliptic integral. (Math.) See Integral. -- Elliptic polarization. See under Polarization.

ially, in reference to the figure of the earth, the difference between the equatorial and polar semidiameters, divided by the equatorial; thus, the ellipticity of the earth is

e power; impotent. Johnson. Frigid zone, that part of the earth which lies between either polar circle and its pole. It extends 23Arctic.

d into it; -- called also weeping sinew. Ganglion cell, a nerve cell. See Illust. under Bipolar.

or period (Geol.), a period during which the climate of the modern temperate regions was polar, and ice covered large portions of the northern hemisphere to the mountain tops. -- Glacial theory or hypothesis. (Geol.) See Glacier theory, under Glacier.