What is "mountain barometer"

Mountain \Moun"tain\ (moun"t[i^]n), a.

1. Of or pertaining to a mountain or mountains; growing or living on a mountain; found on or peculiar to mountains; among mountains; as, a mountain torrent; mountain pines; mountain goats; mountain air; mountain howitzer.

2. Like a mountain; mountainous; vast; very great. The high, the mountain majesty of worth. --Byron. Mountain antelope (Zo["o]l.), the goral. Mountain ash (Bot.), an ornamental tree, the Pyrus Americana (or Sorbus Americana), producing beautiful bunches of red berries. Its leaves are pinnate, and its flowers white, growing in fragrant clusters. The European species is the Pyrus aucuparia, or rowan tree. Mountain barometer, a portable barometer, adapted for safe transportation, used in measuring the heights of mountains. Mountain beaver (Zo["o]l.), the sewellel. Mountain blue (Min.), blue carbonate of copper; azurite. Mountain cat (Zo["o]l.), the catamount. See Catamount. Mountain chain, a series of contiguous mountain ranges, generally in parallel or consecutive lines or curves. Mountain cock (Zo["o]l.), capercailzie. See Capercailzie. Mountain cork (Min.), a variety of asbestus, resembling cork in its texture. Mountain crystal. See under Crystal. Mountain damson (Bot.), a large tree of the genus Simaruba ( Simaruba amarga) growing in the West Indies, which affords a bitter tonic and astringent, sometimes used in medicine. Mountain dew, Scotch whisky, so called because often illicitly distilled among the mountains. [Humorous] Mountain ebony (Bot.), a small leguminous tree ( Bauhinia variegata) of the East and West Indies; -- so called because of its dark wood. The bark is used medicinally and in tanning. Mountain flax (Min.), a variety of asbestus, having very fine fibers; amianthus. See Amianthus. Mountain fringe (Bot.), climbing fumitory. See under Fumitory. Mountain goat. (Zo["o]l.) See Mazama. Mountain green. (Min.)

   1. Green malachite, or carbonate of copper.

   2. See Green earth, under Green, a. Mountain holly (Bot.), a branching shrub ( Nemopanthes Canadensis), having smooth oblong leaves and red berries. It is found in the Northern United States. Mountain laurel (Bot.), an American shrub ( Kalmia latifolia) with glossy evergreen leaves and showy clusters of rose-colored or white flowers. The foliage is poisonous. Called also American laurel, ivy bush, and calico bush. See Kalmia. Mountain leather (Min.), a variety of asbestus, resembling leather in its texture. Mountain licorice (Bot.), a plant of the genus Trifolium ( Trifolium Alpinum). Mountain limestone (Geol.), a series of marine limestone strata below the coal measures, and above the old red standstone of Great Britain. See Chart of Geology. Mountain linnet (Zo["o]l.), the twite. Mountain magpie. (Zo["o]l.)

      1. The yaffle, or green woodpecker.

      2. The European gray shrike. Mountain mahogany (Bot.) See under Mahogany. Mountain meal (Min.), a light powdery variety of calcite, occurring as an efflorescence. Mountain milk (Min.), a soft spongy variety of carbonate of lime. Mountain mint. (Bot.) See Mint. Mountain ousel (Zo["o]l.), the ring ousel; -- called also mountain thrush and mountain colley. See Ousel. Mountain pride, or Mountain green (Bot.), a tree of Jamaica ( Spathelia simplex), which has an unbranched palmlike stem, and a terminal cluster of large, pinnate leaves. Mountain quail (Zo["o]l.), the plumed partridge ( Oreortyx pictus) of California. It has two long, slender, plumelike feathers on the head. The throat and sides are chestnut; the belly is brown with transverse bars of black and white; the neck and breast are dark gray. Mountain range, a series of mountains closely related in position and direction. Mountain rice. (Bot.)

         1. An upland variety of rice, grown without irrigation, in some parts of Asia, Europe, and the United States.

         2. An American genus of grasses ( Oryzopsis).

            Mountain rose (Bot.), a species of rose with solitary flowers, growing in the mountains of Europe ( Rosa alpina).

            Mountain soap (Min.), a soft earthy mineral, of a brownish color, used in crayon painting; saxonite.

            Mountain sorrel (Bot.), a low perennial plant ( Oxyria digyna with rounded kidney-form leaves, and small greenish flowers, found in the White Mountains of New Hampshire, and in high northern latitudes.
            --Gray.

            Mountain sparrow (Zo["o]l.), the European tree sparrow.

            Mountain spinach. (Bot.) See Orach.

            Mountain tobacco (Bot.), a composite plant ( Arnica montana) of Europe; called also leopard's bane.

            Mountain witch (Zo["o]l.), a ground pigeon of Jamaica, of the genus Geotrygon.

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.