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The science which relates to the action of light on sensitive bodies in the production of pictures, the fixation of images, and the like.

The application of photography to the delineation of the sun, moon, and stars.

The art of producing photographs in colors.

Same as Photolithography.

The art of making microphotographs.

The photography of distant objects in more enlarged form than is possible by the ordinary means, usually by a camera provided with a telephoto lens or mounted in place of the eyepiece of a telescope, so that the real or a magnified image falls on the sensitive plate.

(found chiefly in solar or electric light) by which chemical changes are produced, as in photography.

fires, ventilating mines, or filling the pipes of an organ with wind. Bellows camera, in photography, a form of camera, which can be drawn out like an accordion or bellows. -- Hydrostatic bellows. See Hydrostatic. -- A pair of bellows, the ordinary household instrument for blowing fires, consisting of two nearly hea…

A chamber, or instrument having a chamber. Specifically: The camera obscura when used in photography. See Camera, and Camera obscura. Bellows camera. See under Bellows. -- In camera (Law), in a judge's chamber, that is, privately; as, a judge hears testimony which is not fit for the open court in camera. -- Panoramic…

-- Carbon tissue, paper coated with gelatine and pigment, used in the autotype process of photography. Abney. -- Gas carbon, a compact variety of carbon obtained as an incrustation on the interior of gas retorts, and used for the manufacture of the carbon rods of pencils for the voltaic, arc, and for the plates of vol…

process depending upon chemical action; specif., a process of zinc etching not employing photography. -- Chem`i*graph"ic (#), a.

treat or prepare with a chloride, as a plate with chloride of silver, for the purposes of photography. R. Hunt.

ontaining for wounds; but its chief application is as a vehicle for the sensitive film in photography. Collodion process (Photog.), a process in which a film of sensitized collodion is used in preparing the plate for taking a picture. -- Styptic collodion, collodion containing an astringent, as tannin.…

xtract of seeds, or a mixture of oil and water united by a mucilaginous substance. (b) In photography, a liquid preparation of collodion holding salt of silver, used in the photographic process.

C6H2(HO)3.CO2H, with an astringent taste, and is a strong reducing agent, as employed in photography. It is usually prepared from tannin, and both give a dark color with iron salts, forming tannate and gallate of iron, which are the essential ingredients of common black ink.

Photography. R. Hunt.

One who or that which intensifies or strengthens; in photography, an agent used to intensify the lights or shadows of a picture.

To treat or impregnate with iodine or its compounds; as, to iodize a plate for photography. R. Hunt.

ng light (the so-called magnesium light) which is used in signaling, in pyrotechny, or in photography where a strong actinic illuminant is required. Its compounds occur abundantly, as in dolomite, talc, meerschaum, etc. Symbol Mg. Atomic weight, 24.4. Specific gravity, 1.75. Magnesium sulphate. (Chem.) Same as Epsom sa…

An automatic instrument for registering, by photography or otherwise, the states and variations of any of the terrestrial magnetic elements.