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reaction of water, usually one in which the water, entering it centrally, escapes at its periphery in a direction opposed to that of its motion by orifices at right angles, or inclined, to its radii.

ter wheel used in Egypt for raising water, from wells or pits, in buckets attached to its periphery or to an endless rope.

or to a cogwheel, consisting of a sector of a circular gear, or ring, having cogs on the periphery, or face. -- Segment of a line, the part of a line contained between two points on it. -- Segment of a sphere, the part of a sphere cut off by a plane, or included between two parallel planes. -- Ventral segment. (Aco…

wn from the center of a circle, a sphere, or other curved figure, to its circumference or periphery; a radius.

One of the two annular plates at the periphery of a water wheel, which form the sides of the buckets; a shroud plate. Bowsprit shrouds (Naut.), ropes extending from the head of the bowsprit to the sides of the vessel. -- Futtock shrouds (Naut.), iron rods connecting the topmast rigging with the lower rigging, passing…

in 1889 by Otto Anschütz of Berlin, in which the chronophotographs were mounted upon the periphery of a rotating wheel.

A projection from the periphery of a revolving piece, acting as a cam to lift another piece. Toe biter (Zoöl.), a tadpole; a polliwig. -- Toe drop (Med.), a morbid condition of the foot in which the toe is depressed and the heel elevated, as in talipes equinus. See Talipes.

A mill worked by persons treading upon steps on the periphery of a wide wheel having a horizontal axis. It is used principally as a means of prison discipline. Also, a mill worked by horses, dogs, etc., treading an endless belt.

l turned by persons or animals, by treading, climbing, or pushing with the feet, upon its periphery or face. See Treadmill.