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equilibrium. -- Balance valve, a valve whose surfaces are so arranged that the fluid pressure tending to seat, and that tending to unseat the valve, are nearly in equilibrium; esp., a puppet valve which is made to operate easily by the admission of steam to both sides. See Puppet valve. -- Hydrostatic balance. See un…

sam, Balsam of fir, Canada turpentine, a yellowish, viscid liquid, which, by time and exposure, becomes a transparent solid mass. It is obtained from the balm of Gilead (or balsam) fir (Abies balsamea) by breaking the vesicles upon the trunk and branches. See Balm.

harging portions of the color by chemical means, while the rest of the cloth is under pressure. Ure.

An Irish measure of two feet in length.

A vertical line across the staff. Bars divide the staff into spaces which represent measures, and are themselves called measures.

The pressure of one dyne per square centimeter; -- used as a unit of pressure.

An instrument for determining the delicacy of the sense of pressure. -- Bar`æs*the`si*o*met"ric, Bar`es*the`si*o*met"ric (#), a.

To dry or cure by exposure on a frame or gridiron. They use little or no salt, but barbecue their game and fish in the smoke. Stedman.

guns when they are elevated so as to fire over the top of a parapet, and not through embrasures. -- Barbette gun, or Barbette battery, a single gun, or a number of guns, mounted in barbette, or partially protected by a parapet or turret. -- Barbette carriage, a gun carriage which elevates guns sufficiently to be in b…

A pleasure boat; a vessel or boat of state, elegantly furnished and decorated.

Of or pertaining to weight, esp. to the weight or pressure of the atmosphere as measured by the barometer.

Formerly , a measure of length, equal to the average length of a grain of barley; the third part of an inch. John Barleycorn, a humorous personification of barley as the source of malt liquor or whisky.

ing, usually made by the barograph, showing graphically the variations of atmospheric pressure for a given time.

An instrument for recording automatically the variations of atmospheric pressure.

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.

tructed as to inscribe of itself upon paper a record of the variations of atmospheric pressure.

The art or process of making barometrical measurements.

An instrument for recording both pressure and temperature, as of the atmosphere.

A slave warehouse, or an inclosure where slaves are quartered temporarily. Du Chaillu.

The hollow basal part of a feather. Barrel bulk (Com.), a measure equal to five cubic feet, used in estimating capacity, as of a vessel for freight. -- Barrel drain (Arch.), a drain in the form of a cylindrical tube. -- Barrel of a boiler, the cylindrical part of a boiler, containing the flues. -- Barrel of the ear…