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n diminution or loss of consciousness, sensation, and voluntary motion, usually caused by pressure on the brain.

lls made by boring into the earth till the instrument reaches water, which, from internal pressure, flows spontaneously like a fountain. They are usually of small diameter and often of great depth.

The standard atmospheric pressure used in certain physical measurements calculations; conventionally, that pressure under which the barometer stands at 760 millimeters, at a temperature of 0º Centigrade, at the level of the sea, and in the latitude of Paris. Sir W. Thomson.

The pressure or weight of the air at the sea level, on a unit of surface, or about 14.7 Ibs. to the sq. inch. Hydrogen was liquefied under a pressure of 650 atmospheres. Lubbock.

herical a creature. Pope. Atmospheric engine, a steam engine whose piston descends by the pressure of the atmosphere, when the steam which raised it is condensed within the cylinder. Tomlinson. -- Atmospheric line (Steam Engin.), the equilibrium line of an indicator card. Steam is expanded "down to the atmosphere" whe…

n the inner and outer faces of a wall, or upon the haunches of an arch or vault. -- Back pressure. (Steam Engine) See under Pressure. -- Back rest, a guide attached to the slide rest of a lathe, and placed in contact with the work, to steady it in turning. -- Back slang, a kind of slang in which every word is writte…

an 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. Se…

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

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.

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

tracing, 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.

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

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

Changed by pressure so as to be no longer straight; crooked; as, a bent pin; a bent lever.

urnace, a furnace, usually a shaft furnace for smelting ores, into which air is forced by pressure. -- Blast hole, a hole in the bottom of a pump stock through which water enters. -- Blast nozzle, a fixed or variable orifice in the delivery end of a blast pipe; -- called also blast orifice. -- In full blast, in comp…

-- To blow off, to empty (a boiler) of water through the blow-off pipe, while under steam pressure; also, to eject (steam, water, sediment, etc.) from a boiler. -- To blow one's own trumpet, to vaunt one's own exploits, or sound one's own praises. -- To blow out, to extinguish by a current of air, as a candle. -- To…

grate or open fire. (b) A machine for producing an artificial blast or current of air by pressure, as for increasing the draft of a furnace, ventilating a building or shaft, cleansing gram, etc.