gauge of a carriage

Gauge \Gauge\, n. [Written also gage.]
   1. A measure; a standard of measure; an instrument to
      determine dimensions, distance, or capacity; a standard.
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            This plate must be a gauge to file your worm and
            groove to equal breadth by.           --Moxon.
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            There is not in our hands any fixed gauge of minds.
                                                  --I. Taylor.
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   2. Measure; dimensions; estimate.
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            The gauge and dimensions of misery, depression, and
            contempt.                             --Burke.
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   3. (Mach. & Manuf.) Any instrument for ascertaining or
      regulating the dimensions or forms of things; a templet or
      template; as, a button maker's gauge.
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   4. (Physics) Any instrument or apparatus for measuring the
      state of a phenomenon, or for ascertaining its numerical
      elements at any moment; -- usually applied to some
      particular instrument; as, a rain gauge; a steam gauge.
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   5. (Naut.)
      (a) Relative positions of two or more vessels with
          reference to the wind; as, a vessel has the weather
          gauge of another when on the windward side of it, and
          the lee gauge when on the lee side of it.
      (b) The depth to which a vessel sinks in the water.
          --Totten.
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   6. The distance between the rails of a railway.
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   Note: The standard gauge of railroads in most countries is
         four feet, eight and one half inches. Wide, or broad,
         gauge, in the United States, is six feet; in England,
         seven feet, and generally any gauge exceeding standard
         gauge. Any gauge less than standard gauge is now called
         narrow gauge. It varies from two feet to three feet six
         inches.
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   7. (Plastering) The quantity of plaster of Paris used with
      common plaster to accelerate its setting.
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   8. (Building) That part of a shingle, slate, or tile, which
      is exposed to the weather, when laid; also, one course of
      such shingles, slates, or tiles.
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   {Gauge of a carriage}, {car}, etc., the distance between the
      wheels; -- ordinarily called the {track}.

   {Gauge cock}, a stop cock used as a try cock for ascertaining
      the height of the water level in a steam boiler.

   {Gauge concussion} (Railroads), the jar caused by a car-wheel
      flange striking the edge of the rail.

   {Gauge glass}, a glass tube for a water gauge.

   {Gauge lathe}, an automatic lathe for turning a round object
      having an irregular profile, as a baluster or chair round,
      to a templet or gauge.

   {Gauge point}, the diameter of a cylinder whose altitude is
      one inch, and contents equal to that of a unit of a given
      measure; -- a term used in gauging casks, etc.

   {Gauge rod}, a graduated rod, for measuring the capacity of
      barrels, casks, etc.

   {Gauge saw}, a handsaw, with a gauge to regulate the depth of
      cut. --Knight.

   {Gauge stuff}, a stiff and compact plaster, used in making
      cornices, moldings, etc., by means of a templet.

   {Gauge wheel}, a wheel at the forward end of a plow beam, to
      determine the depth of the furrow.

   {Joiner's gauge}, an instrument used to strike a line
      parallel to the straight side of a board, etc.

   {Printer's gauge}, an instrument to regulate the length of
      the page.

   {Rain gauge}, an instrument for measuring the quantity of
      rain at any given place.

   {Salt gauge}, or {Brine gauge}, an instrument or contrivance
      for indicating the degree of saltness of water from its
      specific gravity, as in the boilers of ocean steamers.

   {Sea gauge}, an instrument for finding the depth of the sea.
      

   {Siphon gauge}, a glass siphon tube, partly filled with
      mercury, -- used to indicate pressure, as of steam, or the
      degree of rarefaction produced in the receiver of an air
      pump or other vacuum; a manometer.

   {Sliding gauge}. (Mach.)
      (a) A templet or pattern for gauging the commonly accepted
          dimensions or shape of certain parts in general use,
          as screws, railway-car axles, etc.
      (b) A gauge used only for testing other similar gauges,
          and preserved as a reference, to detect wear of the
          working gauges.
      (c) (Railroads) See Note under {Gauge}, n., 5.

   {Star gauge} (Ordnance), an instrument for measuring the
      diameter of the bore of a cannon at any point of its
      length.

   {Steam gauge}, an instrument for measuring the pressure of
      steam, as in a boiler.

   {Tide gauge}, an instrument for determining the height of the
      tides.

   {Vacuum gauge}, a species of barometer for determining the
      relative elasticities of the vapor in the condenser of a
      steam engine and the air.

   {Water gauge}.
      (a) A contrivance for indicating the height of a water
          surface, as in a steam boiler; as by a gauge cock or
          glass.
      (b) The height of the water in the boiler.

   {Wind gauge}, an instrument for measuring the force of the
      wind on any given surface; an anemometer.

   {Wire gauge}, a gauge for determining the diameter of wire or
      the thickness of sheet metal; also, a standard of size.
      See under {Wire}.
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