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Noah Webster's 1828 American Dictionary
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V  ›  valve
V  ›  valve
1828 Definition

VALVE, n. valv. [L. valvae, folding doors; coinciding with valvo.]

1. A folding door.

Swift through the valves the visionary fair repass'd.

2. A lid or cover so formed as to open a communication in one direction, and close it in the other. Thus the valve of a common pump opens upwards to admit the water, and closes downwards to prevent its return.

3. In anatomy, a membranous partition within the cavity of a vessel, which opens to allow the passage of a fluid in one direction, and shuts to prevent its regurgitation.

4. In botany, the outer coat, shell or covering of a capsule or other pericarp, or rather one of the pieces which compose it; also, one of the leaflets composing the calyx and corol in grasses.

5. One of the pieces or divisions in bivalve and multivalve shells.
1913 Definition
Valve (valve)
n.(?)
Valve
[L. valva the leaf, fold, or valve of a door: cf. F. valve.]

  1. A door; especially, one of a pair of folding doors, or one of the leaves of such a door.

    Swift through the valves the visionary fair
    Repassed.
    Pope.

    Heavily closed, . . . the valves of the barn doors. Longfellow.

  2. A lid, plug, or cover, applied to an aperture so that by its movement, as by swinging, lifting and falling, sliding, turning, or the like, it will open or close the aperture to permit or prevent passage, as of a fluid.

    * A valve may act automatically so as to be opened by the effort of a fluid to pass in one direction, and closed by the effort to pass in the other direction, as a clack valve; or it may be opened or closed by hand or by mechanism, as a screw valve, or a slide valve.

  3. One or more membranous partitions, flaps, or folds, which permit the passage of the contents of a vessel or cavity in one direction, but stop or retard the flow in the opposite direction; as, the ileocolic, mitral, and semilunar valves.
  4. One of the pieces into which a capsule naturally separates when it bursts.
    (b)
  5. One of the pieces or divisions of bivalve or multivalve shells.

    Air valve, Ball valve, Check valve, etc. See under Air. Ball, Check, etc. -- Double-beat valve, a kind of balance valve usually consisting of a movable, open-ended, turban-shaped shell provided with two faces of nearly equal diameters, one above another, which rest upon two corresponding seats when the valve is closed. -- Equilibrium valve. (a) A balance valve. See under Balance. (b) A valve for permitting air, steam, water, etc., to pass into or out of a chamber so as to establish or maintain equal pressure within and without. -- Valve chest (Mach.), a chamber in which a valve works; especially (Steam Engine), the steam chest; -- called in England valve box, and valve casing. See Steam chest, under Steam. -- Valve face (Mach.), that part of the surface of a valve which comes in contact with the valve seat. -- Valve gear, or Valve motion (Steam Engine), the system of parts by which motion is given to the valve or valves for the distribution of steam in the cylinder. For an illustration of one form of valve gear, see Link motion. -- Valve seat. (Mach.) (a) The fixed surface on which a valve rests or against which it presses. (b) A part or piece on which such a surface is formed. -- Valve stem (Mach.), a rod attached to a valve, for moving it. -- Valve yoke (Mach.), a strap embracing a slide valve and connecting it to the valve stem.


1828 dictionary
Noah Says...
An attempt to conduct the affairs of a free government with wisdom and impartiality, and to preserve the just rights of all classes of citizens, without the guidance of Divine precepts, will certainly end in disappointment. God is the supreme moral Governor of the world He has made, and as He Himself governs with perfect rectitude, He requires His rational creatures to govern themselves in like manner. If men will not submit to be controlled by His laws, He will punish them by the evils resulting from their own disobedience.…
 Letter to David McClure :: October 25, 1837 




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