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of the sea; as, marine deposits. Marine acid (Chem.), hydrochloric acid. [Obs.] -- Marine barometer. See under Barometer. -- Marine corps, a corps formed of the officers, noncommissioned officers, privates, and musicants of marines. -- Marine engine (Mech.), a steam engine for propelling a vessel. -- Marine glue. Se…

Of or pertaining to, or containing, mercury; as, mercurial preparations, barometer. See Mercury, 2.

s. It is a heavy, opaque, glistening liquid (commonly called quicksilver), and is used in barometers, thermometers, ect. Specific gravity 13.6. Symbol Hg (Hydrargyrum). Atomic weight 199.8. Mercury has a molecule which consists of only one atom. It was named by the alchemists after the god Mercury, and designated by hi…

smits automatically to a central station atmospheric changes as marked by the anemometer, barometer, thermometer, etc.

A suffix denoting that by which anything is measured; as, barometer, chronometer, dynamometer.

fragrant clusters. The European species is the P. aucuparia, or rowan tree. -- Mountain barometer, a portable barometer, adapted for safe transportation, used in measuring the heights of mountains. -- Mountain beaver (Zoöl.), the sewellel. -- Mountain blue (Min.), blue carbonate of copper; azurite. -- Mountain cat…

An aneroid barometer having a second scale that gives the approximate elevation above sea level of the place where the observation is made.

An observation read from the scale of a graduated instrument; as, the reading of a barometer. Reading of a bill (Legislation), its normal recital, by the proper officer, before the House which is to consider it.

ed times, as at the maxima and minima of variations; as, a self-registering anemometer or barometer.

another across an intervening valley, following the depression of the ground. -- Siphon barometer. See under Barometer. -- Siphon bottle, a bottle for holding aërated water, which is driven out through a bent tube in the neck by the gas within the bottle when a valve in the tube is opened; -- called also gazogene, a…

A sensitive kind of barometer, in which the pressure of the atmosphere, acting upon a liquid, as oil, in the lower portion of the instrument, compresses an elastic gas in the upper part.

nd mathematician, who, in 1643, discovered that the rise of a liquid in a tube, as in the barometer, is due to atmospheric pressure. See Barometer. Torricellian tube, a glass tube thirty or more inches in length, open at the lower end and hermetically sealed at the upper, such as is used in the barometer. -- Torricell…

An instrument for the comparison of barometers.

erature only, and may be measured by introducing a small quantity of the substance into a barometer and noting the depression of the column of mercury.

long the divisions of a graduated instrument, as the limb of a sextant, or the scale of a barometer, for indicating parts of divisions. It is so graduated that a certain convenient number of its divisions are just equal to a certain number, either one less or one more, of the divisions of the instrument, so that parts…

nts at a given hour and over an extended region. Such maps usually show the height of the barometer, the temperature of the air, the relative humidity, the state of the weather, and the direction and velocity of the wind. Isobars and isotherms outline the general distribution of temperature and pressure, while shaded a…

tmosphere, especially changes of atmospheric pressure, and hence changes of weather, as a barometer or baroscope. Poor man's weatherglass. (Bot.) See under Poor.

one of numerous species of rotifers having a ciliated disk at the anterior end. -- Wheel barometer. (Physics) See under Barometer. -- Wheel boat, a boat with wheels, to be used either on water or upon inclined planes or railways. -- Wheel bug (Zoöl.), a large North American hemipterous insect (Prionidus cristatus) w…