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SECTION OP WCIR

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

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SECTION OP WCIR . 69 2.* The earliest See also:

FORM (Lat. forma)

form of shutter See also:

weir, known as a See also:

bear-See also:

TRAP (0. Eng. treppe or traepee, properly a step, as that or which an animal places its foot and is caught, cf. Ger. Treppe flight of stairs)

trap, intro- duced in the See also:

UNITED

United States in 1818, and subsequently erected across the See also:

MARNE

Marne in See also:

France, consists of two wooden See also:

GATES, HORATIO (1728-1806)

gates, each turning on a See also:

HORIZONTAL

horizontal See also:

AXIS (Lat. for " axle ")

axis laid across 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, inclined towards one another and abutting together at an See also:

ANGLE (from the Lat. angulus, a corner, a diminutive, of which the primitive form, angus, does not occur in Latin; cognate are the Lat. angere, to compress into a bend or to strangle, and the Gr. ayKOS, a bend; both connected with the Aryan root ank-, to

angle in the centre when the weir is closed; the up-stream one serves as the weir, and the down-stream one forms its support, and both fall See also:

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

flat upon the apron for opening the weir). This weir is raised by admitting See also:

WATER

water under pressure beneath the gates through culverts in connexion with the upper See also:

POOL

pool; and is lowered by unfastening the raised gates and letting the water under them See also:

ESCAPE (in mid. Eng. eschape or escape, from the O. Fr. eschapper, modern echapper, and escaper, low Lat. escapium, from ex, out of, and cappa, cape, cloak; cf. for the sense development the Gr. iichueoOat, literally to put off one's clothes, hence to sli

escape into the See also:

LOWER

lower pool. This old form of bear-trap has been used for closing an opening 52 ft. wide to provide for the escape of See also:

DRIFT (from "drive ")

drift at the See also:

Davis See also:

Rivers and Canals, p. 132 and See also:

PLATE

plate iv. fig. 15. See also:

ISLAND (O.E. ieg =isle, +land')

Island weir across the See also:

OHIO

Ohio. Improvements, however, in the bear-trap have been introduced in the United States, one of the best novel forms being shown in fig. 8, whereby the pass of a weir 8o ft. in width can be readily closed, opened or partially opened under a maximum See also:

head of i6 ft. by means of chains worked by a winch.' The shutter weir, introduced on the upper See also:

Seine about the See also:

MIDDLE

middle of the 19th See also:

CENTURY (from Lat. centuria, a division of a hundred men)

century and subsequently adopted for weirs across several rivers in France, See also:

Belgium and the United States, consists of a See also:

ROW, JOHN (c. 1525—1580)

row of wooden or See also:

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

iron shutters turning on a horizontal axis a little above their centre of pressure, See also:

BORNE, KARL LUDWIG (1786–1837)

borne by an iron trestle at the back of each shutter, which is hinged to the apron of the weir, and supported when raised by an iron prop resting against an iron See also:

SHOE (a word appearing in the Teutonic languages in various forms, as Ger. Schuh, Swed. and Dan. sko, sometimes supposed to come from an unknown root ska or sku, cover)

shoe fastened on the apron (fig. 9).

End of Article: SECTION OP WCIR

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