Search the Dictionary

pertaining to or designating plates, processes, or the pictures made by them, in which gradation of tone in the photograph is reproduced by a graduated system of dotted and checkered spots, usually nearly invisible to the unaided eye, produced by the interposition between the camera and the object of a screen. The name…

A platform of a staircase where the stair turns back in exactly the reverse direction of the lower flight. See Quarterpace.

A small hole in a boiler for the insertion of the hand in cleaning, etc. Hand-hole plate, the cover of a hand-hole.

which the sound, which resembled the oboe, was produced by the vibration of thin metallic plates, acted upon by blowing through a tube.

A process of hardening the face of steel, as armor plates, invented by Hayward A. Harvey of New Jersey, consisting in the additional carburizing of the face of a piece of low carbon steel by subjecting it to the action of carbon under long-continued pressure at a very high heat, and then to a violent chilling, as by a…

A raised part of the floor of a large room; a platform for a raised table or throne. See Dais.

ggregate surface exposed to fire or to the heated products of combustion, esp. of all the plates or sheets that are exposed to water on their opposite surfaces; -- called also fire surface.

(Naut.), a chain passing from the bowsprit cap around the heel of the jib boom. -- Heel plate, the butt plate of a gun. -- Heel of a rafter. (Arch.) See Heel, n., 7. -- Heel ring, a ring for fastening a scythe blade to the snath. -- Neck and heels, the whole body. (Colloq.) -- To be at the heels of, to pursue clos…

A method of transferring pictures from photographic negatives to hardened gelatin plates from which impressions are produced on paper as by lithography.

ld geckoes of the genus Hemidactylus. The hemidactyls have dilated toes, with two rows of plates beneath.

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

gle formed by the meeting of two sloping sides or skirts of a roof, which have their wall plates running in different directions.

A harmless North American snake of the genus Heterodon, esp. H. platyrhynos; -- called also puffing adder, blowing adder, and sand viper.

frame or pedestal in which a railway car axle box slides up and down; -- also called horn plate. -- Horn of a dilemma. See under Dilemma. -- Horn distemper, a disease of cattle, affecting the internal substance of the horn. -- Horn drum, a wheel with long curved scoops, for raising water. -- Horn lead (Chem.), chlo…

A shoe for horses, consisting of a narrow plate of iron in form somewhat like the letter U, nailed to a horse's hoof.

Acrid; biting; pungent; as, hot as mustard. Hot bed (Iron Manuf.), an iron platform in a rolling mill, on which hot bars, rails, etc., are laid to cool. -- Hot wall (Gardening), a wall provided with flues for the conducting of heat, to hasten the growth of fruit trees or the ripening of fruit. -- Hot well (Condensing…

at a given hour; the intersection of an hour circle which the face of the dial. -- Hour plate, the plate of a timepiece on which the hours are marked; the dial. Locke. -- Sidereal hour, the twenty-fourth part of a sidereal day. -- Solar hour, the twenty-fourth part of a solar day. -- The small hours, the early hou…

butting piece; a strengthening piece, esp.: (Mil.) A piece of wood at the lower end of a platform, designed to prevent the wheels of gun carriages from injuring the parapet.

The platform on which candidates for Parliament formerly stood in addressing the electors. [Eng.] When the rotten hustings shake In another month to his brazen lies. Tennyson.

or porcelain, is the agent employed in etching glass, and is preserved only in vessels of platinum, lead, caoutchouc, or gutta-percha.