hydrostatic press

Hydrostatic \Hy`dro*stat"ic\, Hydrostatical \Hy`dro*stat"ic*al\,
   a. [Hydro-, 1 + Gr. ? causing to stand: cf. F. hydrostatique.
   See {Static}.]
   Of or relating to hydrostatics; pertaining to, or in
   accordance with, the principles of the equilibrium of fluids.
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         The first discovery made in hydrostatics since the time
         of Archimedes is due to Stevinus.        --Hallam.
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   {Hydrostatic balance}, a balance for weighing substances in
      water, for the purpose of ascertaining their specific
      gravities.

   {Hydrostatic bed}, a water bed.

   {Hydrostatic bellows}, an apparatus consisting of a
      water-tight bellowslike case with a long, upright tube,
      into which water may be poured to illustrate the
      hydrostatic paradox.

   {Hydrostatic paradox}, the proposition in hydrostatics that
      any quantity of water, however small, may be made to
      counterbalance any weight, however great; or the law of
      the equality of pressure of fluids in all directions.

   {Hydrostatic press}, a machine in which great force, with
      slow motion, is communicated to a large plunger by means
      of water forced into the cylinder in which it moves, by a
      forcing pump of small diameter, to which the power is
      applied, the principle involved being the same as in the
      hydrostatic bellows. Also called {hydraulic press}, and
      {Bramah press}. In the illustration, a is a pump with a
      small plunger b, which forces the water into the cylinder
      c, thus driving upward the large plunder d, which performs
      the reduced work, such as compressing cotton bales, etc.
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Press \Press\, n. [F. presse. See 4th {Press}.]
   1. An apparatus or machine by which any substance or body is
      pressed, squeezed, stamped, or shaped, or by which an
      impression of a body is taken; sometimes, the place or
      building containing a press or presses.
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   Note: Presses are differently constructed for various
         purposes in the arts, their specific uses being
         commonly designated; as, a cotton press, a wine press,
         a cider press, a copying press, etc. See {Drill press}.
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   2. Specifically, a printing press.
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   3. The art or business of printing and publishing; hence,
      printed publications, taken collectively, more especially
      newspapers or the persons employed in writing for them;
      as, a free press is a blessing, a licentious press is a
      curse.
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   4. An upright case or closet for the safe keeping of
      articles; as, a clothes press. --Shak.
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   5. The act of pressing or thronging forward.
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            In their throng and press to that last hold. --Shak.
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   6. Urgent demands of business or affairs; urgency; as, a
      press of engagements.
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   7. A multitude of individuals crowded together; ? crowd of
      single things; a throng.
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            They could not come nigh unto him for the press.
                                                  --Mark ii. 4.
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   {Cylinder press}, a printing press in which the impression is
      produced by a revolving cylinder under which the form
      passes; also, one in which the form of type or plates is
      curved around a cylinder, instead of resting on a flat
      bed.

   {Hydrostatic press}. See under {Hydrostatic}.

   {Liberty of the press}, the free right of publishing books,
      pamphlets, or papers, without previous restraint or
      censorship, subject only to punishment for libelous,
      seditious, or morally pernicious matters.

   {Press bed}, a bed that may be folded, and inclosed, in a
      press or closet. --Boswell.

   {Press of sail}, (Naut.), as much sail as the state of the
      wind will permit.
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