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mulation (Physiol.), the simulation sometimes produced when one electrode of an induction apparatus is applied to a nerve; -- called also unipolar induction action. Du Bois-Reymond.

An apparatus for the determination of the amount of urea in urine, in which the nitrogen evolved by the action of certain reagents, on a given volume of urine, is collected and measured, and the urea calculated accordingly.

An apparatus for the measurement of low pressures.

retort used in sugar making for boiling down sirup. It is so connected with an exhausting apparatus that a partial vacuum is formed within. This allows the evaporation and concentration to take place at a lower atmospheric pressure and hence also at a lower temperature, which largely obviates the danger of burning the…

An apparatus for measuring speed, as of machinery or vessels, but especially of projectiles.

or pertaining to ventilation; adapted to secure ventilation; ventilating; as, ventilative apparatus.

substances; -- called also vinegar worm. -- Vinegar lamp (Chem.), a fanciful name of an apparatus designed to oxidize alcohol to acetic acid by means of platinum. -- Vinegar plant. See 4th Mother. -- Vinegar tree (Bot.), the stag-horn sumac (Rhus typhina), whose acid berries have been used to intensify the sourness…

ch is very hard and difficult to fuse, used as an insulator in electrical lamps and other apparatus.

Of or pertaining to Alessandro Volta, who first devised apparatus for developing electric currents by chemical action, and established this branch of electric science; discovered by Volta; as, voltaic electricity.

One who, or that which, vulcanizes; esp., an apparatus for vulcanizing caoutchouc.

eetle (Zoöl.), the European dor. -- Watchman's clock, a watchman's detector in which the apparatus for recording the times of visiting several stations is contained within a single clock. -- Watchman's detector, or Watchman's time detector, an apparatus for recording the time when a watchman visits a station on his r…

A goose-neck apparatus for supplying water from an elevated tank, as to the tender of a locomotive.

An hydraulic apparatus, or a system of works or fixtures, by which a supply of water is furnished for useful or ornamental purposes, including dams, sluices, pumps, aqueducts, distributing pipes, fountains, etc.; -- used chiefly in the plural.

weighed. -- Weighing house. See Weigh-house. -- Weighing machine, any large machine or apparatus for weighing; especially, platform scales arranged for weighing heavy bodies, as loaded wagons.

a. & n. from Whirl, v. t. Whirling table. (a) (Physics) An apparatus provided with one or more revolving disks, with weights, pulleys, and other attachments, for illustrating the phenomena and laws of centrifugal force, and the like. (b) A potter's wheel.

An apparatus used for winding silk, cotton, etc., on spools, bobbins, reels, or the like.

An apparatus resembling a winch or windlass, for bending the bow of an arblast, or crossbow. [Obs.] Shak. Chinese windlass. See Differential windlass, under Differential.

strength as ordinary laudanum; -- also Sydenham's laudanum. -- Wine press, a machine or apparatus in which grapes are pressed to extract their juice. -- Wine skin, a bottle or bag of skin, used, in various countries, for carrying wine. -- Wine stone, a kind of crust deposited in wine casks. See 1st Tartar, 1. -- W…

oscillator, these waves being launched into space through a lofty antenna. The receiving apparatus consisted of another antenna in circuit with a coherer and small battery for operating through a relay the ordinary telegraphic receiver. This apparatus contains the essential features of all the systems now in use. -- W…

a. & n. from Wreck, v. Wrecking car (Railway), a car fitted up with apparatus and implements for removing the wreck occasioned by an accident, as by a collision. -- Wrecking pump, a pump especially adapted for pumping water from the hull of a wrecked vessel.