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lcons, esp. Falco rusticolus and the white species F. Islandicus, both of which are circumpolar. The black and the gray are varieties of the former. See Illust. of Accipiter. [Written also gerfalcon, gierfalcon, and jerfalcon.]

Turning the plane of polarization circularly or spirally to the right or left.

of iodoquinine, a substance crystallizing in thin plates remarkable for their effects in polarizing light.

dition previously invuced, observed in magnetism, thermoelectricity, etc., on reversal of polarity.

ce pilot, a pilot who has charge of a vessel where the course is obstructed by ice, as in polar seas; -- called also ice master. -- Ice pitcher, a pitcher adapted for ice water. -- Ice plow, a large tool for grooving and cutting ice. ice sculpture = a sculpture carved from a block of ice, often used for decorating re…

ty of calcite, the best of which is obtained in Iceland. It is used for the prisms of the polariscope, because of its strong double refraction. Cf. Calcite.

Exhibiting interference figures without the aid of a polariscope, as certain crystals.

Not active; inert; esp., not exhibiting any action or activity on polarized light; optically neutral; -- said of isomeric forms of certain substances, in distinction from other forms which are optically active; as, racemic acid is an inactive tartaric acid.

Rendered electro-polar by induction, or brought into the opposite electrical state by the influence of inductive bodies.

The property by which one body, having electrical or magnetic polarity, causes or induces it in another body without direct contact; an impress of electrical or magnetic force or condition from one body on another without actual contact. Electro-dynamic induction, the action by which a variable or interrupted current o…

ing; inseparably attached or connected; naturally pertaining to; innate; inalienable; as, polarity is an inherent quality of the magnet; the inherent right of men to life, liberty, and protection. "A most inherent baseness." Shak. The sore disease which seems inherent in civilization. Southey.

he figures observed when certain sections of crystallized bodies are viewed in converging polarized light; thus, a section of a uniaxial crystal, cut normal to the vertical axis, shows a series of concentric colored rings with a single black cross; -- so called because produced by the interference of luminous waves. -…

e color, as lines drawn through certain points in experiments on the chromatic effects of polarized light in crystals.

and the same ultimate constitution), are yet physically different, as in their action on polarized light, as dextro- and lævo-tartaric acids. In such compounds there is usually at least one unsymmetrical carbon atom. See Unsymmetrical.

Uniformity of physical properties in all directions in a body; absence of all kinds of polarity; specifically, equal elasticity in all directions.

acid), but the latter is optically inactive, while sarcolactic acid rotates the plane of polarization to the right. The third acid, ethylene lactic acid, accompanies sarcolactic acid in the juice of flesh, and is optically inactive. -- Lactic ferment, an organized ferment (Bacterium lacticum or lactis), which produce…

Turning or twisting the plane of polarization towards the left, as levulose, levotartaric acid, etc. [Written also lævogyrate.]

nded screw; counter-clockwise rotation; -- applied chiefly to the turning of the plane of polarization of light.

Turning or rotating the plane of polarization towards the left; levogyrate, as levulose, left handed quartz crystals, etc. [Written also lævorotatory.]

and hence called also fruit sugar. It is called levulose, because it rotates the plane of polarization to the left. [Written also lævulose.]C6H12O6.