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tube, where the image is formed and viewed through the eyeplace. -- Newtonian theory of light. See Note under Light.

used, invented by J. N. Niepce, a French chemist, in 1829. It depends upon the action of light in rendering a thin layer of bitumen, with which the plate is coated, insoluble.

r the time from sunset to sunrise; esp., the time between dusk and dawn, when there is no light of the sun, but only moonlight, starlight, or artificial light. And God called the light Day, and the darkness he called Night. Gen. i. 5.

Light and quick in motion; moving with ease and celerity; lively; swift. Through the mid seas the nimble pinnace sails. Pope.

The quality of being nimble; lightness and quickness in motion; agility; swiftness.

In a nimble manner; with agility; with light, quick motion.

A circle, or disk, or any indication of radiant light around the heads of divinities, saints, and sovereigns, upon medals, pictures, etc.; a halo. See Aureola, and Glory, n., 5.

Capable of living without light; as, nonphotobiotic plant cells, or cells which habitually live in darkness.

oming from the north; as, a northern wind. Northern diver. (Zoöl.) See Loon. -- Northern lights. See Aurora borealis, under Aurora. -- Northern spy (Bot.), an excellent American apple, of a yellowish color, marked with red.

A light fabric of wool, worn on the head by women; a cloud.

age; done or used at a wedding; as, nuptial rites and ceremonies. Then, all in heat, They light the nuptial torch. Milton.

A disease of the eye, in consequence of which the patient can see well in a faint light or at twilight, but is unable to see during the day or in a strong light; day blindness.

Objectivity. Is there such a motion or objectiveness of external bodies, which produceth light Sir M. Hale

Inauspicious; ill-omened. [R.] [A Latinism] At the cheerful light, The groaning ghosts and birds obscene take flight. Dryden.

Covered over, shaded, or darkened; destitute of light; imperfectly illuminated; dusky; dim. His lamp shall be put out in obscure darkness. Prov. xx. 20.

to retard; as, the bar in the harbor obstructs the passage of ships; clouds obstruct the light of the sun; unwise rules obstruct legislation. "Th' impatience of obstructed love." Johnson.

ke unnecessary; as, to obviate the necessity of going. To lay down everything in its full light, so as to obviate all exceptions. Woodward.

the phenomena of mesmerism, and to be developed by various agencies, as by magnets, heat, light, chemical or vital action, etc.; -- called also odyle or the odylic force. [Archaic] That od force of German Reichenbach Which still, from female finger tips, burnt blue. Mrs. Browning.

Having a brownish red color; -- used esp. of light-colored red wine.

To be offensive to; to harm; to pain; to annoy; as, strong light offends the eye; to offend the conscience.