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SCALE 200

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Originally appearing in Volume V28, Page 498 of the 1911 Encyclopedia Britannica.

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SCALE 200 . or by pulling the props clear of their shoes by chains fastened to the bottom of the shutters; the unsupported trestles and shutters fall See also:

FLAT (a modification of O. Eng. flet, an obsolete word of Teutonic origin, meaning the ground beneath the feet)

flat on the See also:

APRON (a corruption arising from a wrong division of " a napron " into " an apron," from the Fr. naperon, napperon, a diminutive of nappe, Lat. mappa, a napkin)

apron on the See also:

TOP (cf. Dan. top, Ger. Topf, also meaning pot)

top of the props, as shown by dotted lines in fig. 9. The See also:

weir is raised again by pulling up the shutters to a See also:

HORIZONTAL

horizontal position by their bottom chains from a See also:

SPECIAL

special See also:

BOAT (0. Eng. bdt; the true etymological connexion with Dutch and Ger. boot, Fr. bateau, Ital. battello presents great difficulties; Celtic forms are from O. Eng.)

boat, or from a See also:

FOOT

foot-See also:

BRIDGE

bridge on movable frames, together with their trestles and the props which are replaced in their shoes. The See also:

DISCHARGE (adapted from the O. Fr. discharge, modern decharge, from a med. Lat. discargare, to unload, dis- and earn care, to load, cf. " charge ")

discharge at the weir whilst it is raised is effected either by partially tipping some of the shutters by chains from a foot-bridge, or by opening butterfly valves resembling small shutters in the upper panels of the shutters. The addition of a foot-bridge greatly facilitates the raising and lowering of these shutter weirs, and also See also:

AIDS

aids the regulation of the discharge; but it renders this See also:

FORM (Lat. forma)

form of weir much more costly than the See also:

ORDINARY (med. Lat. ordinarius, Fr. ordinaire)

ordinary See also:

FRAME

frame weir, and where large quantities of See also:

DRIFT (from "drive ")

drift come down with sudden floods, the frames of the bridge are liable to be carried away, and therefore boats must be relied on for working the weir. The See also:

DRUM (early forms drome or dromme, a word common to many Teut. languages, cf. Dan. tromme, Ger. Trommel: the word is ultimately the same as " trumpet," and is probably onomatopoeic in origin; it appears late in Eng. about the middle of the 16th century)

drum weirs erected across shallow, regulating passes on the See also:

RIVER

river See also:

MARNE

Marne in 1857–1867 comprise a See also:

SERIES (a Latin word from serere, to join)

series of upper and under wrought-See also:

IRON [symbol Fe, atomic weight 55.85 (0=16)]

iron paddles, which can make a See also:

QUARTER (through Fr. from Lat. quartarius, fourth part)

quarter of a Drum revolution See also:

ROUND (O. Fr. rond, Lat. rotundus, the Fr. is the source also of Du. rond; Ger., Swed., Dan. and Nor. rond)

round a central See also:

AXIS (Lat. for " axle ")

axis laid along the See also:

sill of the weir. weir.

End of Article: SCALE 200

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