Part 301

Milton.

Enterprises of great pitch and moment.

Shak.

To lowest pitch of abject fortune.

Milton.

He lived when learning was at its highest pitch.

Addison.

The exact pitch, or limits, where temperance ends.

Sharp.

4. Height; stature. [Obs.] Hudibras.

5. A descent; a fall; a thrusting down.

6. The point where a declivity begins; hence, the declivity itself; a descending slope; the degree or rate of descent or slope; slant; as, a steep pitch in the road; the pitch of a roof.

7. (Mus.) The relative acuteness or gravity of a tone, determined by the number of vibrations which produce it; the place of any tone upon a scale of high and low.

Musical tones with reference to absolute pitch, are named after the first seven letters of the alphabet; with reference to relative pitch, in a series of tones called the scale, they are called one, two, three, four, five, six, seven, eight. Eight is also one of a new scale an octave higher, as one is eight of a scale an octave lower.

8. (Mining) The limit of ground set to a miner who receives a share of the ore taken out.

9. (Mech.) (a) The distance from center to center of any two adjacent teeth of gearing, measured on the pitch line; -- called also circular pitch. (b) The length, measured along the axis, of a complete turn of the thread of a screw, or of the helical lines of the blades of a screw propeller. (c) The distance between the centers of holes, as of rivet holes in boiler plates.

Concert pitch (Mus.), the standard of pitch used by orchestras, as in concerts, etc. -- Diametral pitch (Gearing), the distance which bears the same relation to the pitch proper, or circular pitch, that the diameter of a circle bears to its circumference; it is sometimes described by the number expressing the quotient obtained by dividing the number of teeth in a wheel by the diameter of its pitch circle in inches; as, 4 pitch, 8 pitch, etc. -- Pitch chain, a chain, as one made of metallic plates, adapted for working with a sprocket wheel. -- Pitch line, or Pitch circle (Gearing), an ideal line, in a toothed gear or rack, bearing such a relation to a corresponding line in another gear, with which the former works, that the two lines will have a common velocity as in rolling contact; it usually cuts the teeth at about the middle of their height, and, in a circular gear, is a circle concentric with the axis of the gear; the line, or circle, on which the pitch of teeth is measured. -- Pitch of a roof (Arch.), the inclination or slope of the sides expressed by the height in parts of the span; as, one half pitch; whole pitch; or by the height in parts of the half span, especially among engineers; or by degrees, as a pitch of 30∞, of 45∞, etc.; or by the rise and run, that is, the ratio of the height to the half span; as, a pitch of six rise to ten run. Equilateral pitch is where the two sloping sides with the span form an equilateral triangle. -- Pitch of a plane (Carp.), the slant of the cutting iron. -- Pitch pipe, a wind instrument used by choristers in regulating the pitch of a tune. -- Pitch point (Gearing), the point of contact of the pitch lines of two gears, or of a rack and pinion, which work together.

Pitch"-black` (?), a. Black as pitch or tar.

Pitch"blende` (?), n. [1st pitch + blende.] (Min.) A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite.

Pitch"-dark`, a. Dark as a pitch; pitch-black.

Pitch"er (?), n. 1. One who pitches anything, as hay, quoits, a ball, etc.; specifically (Baseball), the player who delivers the ball to the batsman.

2. A sort of crowbar for digging. [Obs.] Mortimer.

Pitch"er (?), n. [OE. picher, OF. pichier, OHG. pehhar, pehhri; prob. of the same origin as E. beaker. Cf. Beaker.] 1. A wide-mouthed, deep vessel for holding liquids, with a spout or protruding lip and a handle; a water jug or jar with a large ear or handle.

2. (Bot.) A tubular or cuplike appendage or expansion of the leaves of certain plants.

American pitcher plants, the species of Sarracenia. See Sarracenia. -- Australian pitcher plant, the Cephalotus follicularis, a low saxifragaceous herb having two kinds of radical leaves, some oblanceolate and entire, others transformed into little ovoid pitchers, longitudinally triple-winged and ciliated, the mouth covered with a lid shaped like a cockleshell. -- California pitcher plant, the Darlingtonia California. See Darlingtonia. -- Pitcher plant, any plant with the whole or a part of the leaves transformed into pitchers or cuplike organs, especially the species of Nepenthes. See Nepenthes.

Pitch"er*ful (?), n.; pl. Pitcherfuls (&?;). The quantity a pitcher will hold.

Pitch"-faced` (?), a. (Stone Cutting) Having the arris defined by a line beyond which the rock is cut away, so as to give nearly true edges; -- said of squared stones that are otherwise quarry-faced.

Pitch"fork` (?), n. A fork, or farming utensil, used in pitching hay, sheaves of grain, or the like.