Hydraulic mining
Hydraulic Hy*drau"lic, a. [F. hydraulique, L. hydraulicus, fr. Gr. ?, ?, a water organ; "y`dwr water + ? flute, pipe. See {Hydra}.] Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock, crane, or dock. [1913 Webster]

{Hydraulic accumulator}, an accumulator for hydraulic machinery of any kind. See {Accumulator}, 2.

{Hydraulic brake}, a cataract. See {Cataract}, 3.

{Hydraulic cement}, a cement or mortar made of hydraulic lime, which will harden under water.

{Hydraulic elevator}, a lift operated by the weight or pressure of water.

{Hydraulic jack}. See under {Jack}.

{Hydraulic lime}, quicklime obtained from hydraulic limestone, and used for cementing under water, etc.

{Hydraulic limestone}, a limestone which contains some clay, and which yields a quicklime that will set, or form a firm, strong mass, under water.

{Hydraulic main} (Gas Works), a horizontal pipe containing water at the bottom into which the ends of the pipes from the retorts dip, for passing the gas through water in order to remove ammonia.

{Hydraulic mining}, a system of mining in which the force of a jet of water is used to wash down a bank of gold-bearing gravel or earth. [Pacific Coast]

{Hydraulic press}, a hydrostatic press. See under {Hydrostatic}.

{Hydraulic propeller}, a device for propelling ships by means of a stream of water ejected under water rearward from the ship.

{Hydraulic ram}, a machine for raising water by means of the energy of the moving water of which a portion is to be raised. When the rush of water through the main pipe d shuts the valve at a, the momentum of the current thus suddenly checked forces part of it into the air chamber b, and up the pipe c, its return being prevented by a valve at the entrance to the air chamber, while the dropping of the valve a by its own weight allows another rush through the main pipe, and so on alternately.

{Hydraulic valve}. (Mach.) (a) A valve for regulating the distribution of water in the cylinders of hydraulic elevators, cranes, etc. (b) (Gas Works) An inverted cup with a partition dipping into water, for opening or closing communication between two gas mains, the open ends of which protrude about the water. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Hydraulic mining — Hydraulic mining, or hydraulicking, is a form of mining that employs water to dislodge rock material or move sediment. Previously, the use of a large volume of water had been developed by the Romans to remove overburden and then gold bearing… …   Wikipedia

  • hydraulic mining — placer mining using a pressurized stream of water. Also called hydraulicking /huy draw li king, drol i king/. [1855 60, Amer.] * * *       use of a powerful jet of water to dislodge minerals present in unconsolidated material, including mine… …   Universalium

  • hydraulic mining — noun : mining by the action of powerful jets of water compare placer mining * * * placer mining using a pressurized stream of water. Also called hydraulicking /huy draw li king, drol i king/. [1855 60, Amer.] * * * hydraulic mining noun… …   Useful english dictionary

  • hydraulic mining — Hushing Hush ing, n. (Mining) The process of washing ore, or of uncovering mineral veins, by a heavy discharge of water from a reservoir; flushing; also called {booming} and {hydraulic mining}. [1913 Webster +PJC] …   The Collaborative International Dictionary of English

  • hydraulic mining — A method of mining free gold wherein a large volume of water is thrown with great force through a pipe or hose upon the sides of a hill, the gold bearing earth and gravel thereby being washed down so that the gold can readily be separated.… …   Ballentine's law dictionary

  • Hydraulic — Hy*drau lic, a. [F. hydraulique, L. hydraulicus, fr. Gr. ?, ?, a water organ; y dwr water + ? flute, pipe. See {Hydra}.] Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock, crane, or… …   The Collaborative International Dictionary of English

  • Hydraulic accumulator — Hydraulic Hy*drau lic, a. [F. hydraulique, L. hydraulicus, fr. Gr. ?, ?, a water organ; y dwr water + ? flute, pipe. See {Hydra}.] Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock,… …   The Collaborative International Dictionary of English

  • Hydraulic brake — Hydraulic Hy*drau lic, a. [F. hydraulique, L. hydraulicus, fr. Gr. ?, ?, a water organ; y dwr water + ? flute, pipe. See {Hydra}.] Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock,… …   The Collaborative International Dictionary of English

  • Hydraulic cement — Hydraulic Hy*drau lic, a. [F. hydraulique, L. hydraulicus, fr. Gr. ?, ?, a water organ; y dwr water + ? flute, pipe. See {Hydra}.] Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock,… …   The Collaborative International Dictionary of English

  • Hydraulic elevator — Hydraulic Hy*drau lic, a. [F. hydraulique, L. hydraulicus, fr. Gr. ?, ?, a water organ; y dwr water + ? flute, pipe. See {Hydra}.] Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock,… …   The Collaborative International Dictionary of English

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