What is "marine barometer"

Marine \Ma*rine"\, a. [L. marinus, fr. mare the sea: cf. F. marin. See Mere a pool.]

1. Of or pertaining to the sea; having to do with the ocean, or with navigation or naval affairs; nautical; as, marine productions or bodies; marine shells; a marine engine.

2. (Geol.) Formed by the action of the currents or waves 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. See under Glue.

   Marine insurance, insurance against the perils of the sea, including also risks of fire, piracy, and barratry.

   Marine interest, interest at any rate agreed on for money lent upon respondentia and bottomry bonds.

   Marine law. See under Law.

   Marine league, three geographical miles.

   Marine metal, an alloy of lead, antimony, and mercury, made for sheathing ships.
   --Mc Elrath.

   Marine soap, cocoanut oil soap; -- so called because, being quite soluble in salt water, it is much used on shipboard.

   Marine store, a store where old canvas, ropes, etc., are bought and sold; a junk shop. [Eng.]

Barometer \Ba*rom"e*ter\, n. [Gr. ba`ros weight + -meter: cf. F. barom[`e]tre.] An instrument for determining the weight or pressure of the atmosphere, and hence for judging of the probable changes of weather, or for ascertaining the height of any ascent.

Note: The barometer was invented by Torricelli at Florence about 1643. It is made in its simplest form by filling a graduated glass tube about 34 inches long with mercury and inverting it in a cup containing mercury. The column of mercury in the tube descends until balanced by the weight of the atmosphere, and its rise or fall under varying conditions is a measure of the change in the atmospheric pressure. At the sea level its ordinary height is about 30 inches (760 millimeters). See Sympiesometer.
--Nichol.

Aneroid barometer. See Aneroid barometer, under Aneroid.

Marine barometer, a barometer with tube contracted at bottom to prevent rapid oscillations of the mercury, and suspended in gimbals from an arm or support on shipboard.

Mountain barometer, a portable mercurial barometer with tripod support, and long scale, for measuring heights.

Siphon barometer, a barometer having a tube bent like a hook with the longer leg closed at the top. The height of the mercury in the longer leg shows the pressure of the atmosphere.

Wheel barometer, a barometer with recurved tube, and a float, from which a cord passes over a pulley and moves an index.