A peculiar and cheaper form of drum weir has been constructed across ten bays each 75 ft.
- Bear-trap Weir, U.S.A.
The weir across the Jumna was the first attempted in Upper India upon a foundation of fine sand; it is about 800 yds.
The simplest form of weir is a solid, watertight dam of firm earthwork or rubble stone, faced with stone pitching, with cribs filled with rubble, with fascine mattresses weighted with stone, or with masonry, and protected from undermining by sheet piling or one or more rows of well foundations.
which should flow over a waste weir initially r in.
By these arrangements the large draw-door weir across the Thames at Richmond, with three spans of 66 ft.
- Needle Weir, River Moldau.
A weir is thrown across the Betwa about 15 m.
- Lifting-gate Weir and Foot-bridge at Richmond, Surrey.
The discharge of a river at a weir can be regulated as required and considerably increased in flood-time by introducing a series of openings in the centre of a solid weir, with sluice-gates or panels which slide in grooves at the sides of upright frames or masonry piers erected at convenient intervals apart, FIG.
This system, which has been employed for the lowest weir on the Moldau, and for a weir at the upper end of the Danube canal near Vienna to shut out floods and floating ice, as well as on the Seine, possesses the merits of raising all the movable parts of the weir out of water in flood-time, and rendering the working of the weir very safe and easy.
The earliest form of shutter weir, known as a bear-trap, introduced in the United States in 1818, and subsequently erected across the Marne in France, consists of two wooden gates, each turning on a horizontal axis laid across the apron, inclined towards one another and abutting together at an 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 flat upon the apron for opening the weir.'
The Wrecker, an adventurous tale of American life, which mainly belonged to an earlier time, was written in collaboration with Mr Lloyd Osbourne and finally published in 1892; and towards the close of that very eventful and busy year he began The Justice Clerk, afterwards Weir of Hermiston.
the Weir, the condensing water circulates upwards through the tubes; in others, e.g.
Assiut stands near the west bank of the Nile across which, just below the town, is a barrage, completed in 1902, consisting of an open weir, 2733 ft.
This serious defect of solid weirs, where the riparian lands are liable to be injured by inundations, can be slightly mitigated by keeping down the crest of the weir somewhat below the required level, and then raising the water-level at the low stage of the river by placing a row of planks along the top of the weir.
The weir is opened by removing the sliding panels or rolling Scale 'kW.
The 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 aids the regulation of the discharge; but it renders this form of weir much more costly than the ordinary frame weir, and where large quantities of 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 straight, upper paddles form the weir, and can be raised against the stream by making the water from the upper pool press upon the upper faces of the slightly larger lower paddles, .
The ordinary form of frame weir consists of a series of iron frames placed across a river end on to the current, between 3 and 4 ft.
A rapid in the Tagus, artificially converted into a weir, renders irrigation easy, and has thus created an oasis in the midst of the barren plateau of New Castile.
- Shutter Weir with Foot-bridge, Port a l'Anglais, Upper Seine.
WEIR (from O.
He was dictating Weir of Hermiston, apparently in his usual health, on the day he died.
Weir, A Short History of the Hebrew Text (London, 1896); H B.
The needle weir has, however, attained its greatest development in the United States across the Big Sandy river at Louisa, where, instead of needles 3 to 4 in.
- Frame Weir with Rolling-up Curtain, Port Villez, Lower Seine.
works required for this system are a syphon to pass the high level under the main canal near its head, bridges fitted with sluices where each canal passes under an embankment, and an escape weir at the tail of the system, just south of the desert point, to return surplus water to the river.
For this system two syphons will be required near the head, regulating bridges under all the embankments, and an escape weir back into the river.
Priessnitz), of massage (Weir Mitchell), of climate (James Clarke), of diet (R.
Banks thereupon retreated, and, high water in the river having come to an end, the fleet was in the gravest danger of being cut off, until Colonel Bailey suggested, and rapidly carried out, the construction of a dam and weir over which the ships ran down to the lower waters.
This weir retains the river above it at half-tide level, in order to cover the mud-banks which had been bared at low tide between Richmond and Teddington by the lowering of the low-water level, owing to the removal of various obstructions in the river below.
Whereas, however, ordinary frames placed nearer together than their height overlap one another when lowered on to the apron, the trestles of the Louisa weir lie clear of each other quite flat on the apron.
- Spar Weir, Louisa, Big Sandy River, U.S.A.
Island weir across the Ohio.
The weir is opened by releasing the iron props from their shoes, either by a sideways pull of a tripping bar with projecting teeth laid on the apron and worked from the bank, \\\\\\\\\\\\\ [[Scale Zoo.
The weir is raised again by pulling up the shutters to a horizontal position by their bottom chains from a special boat, or from a foot-bridge on movable frames, together with their trestles and the props which are replaced in their shoes.
The merits of this weir in being easily raised against a strong current and in allowing of the perfect regulation of the discharge, are unfortunately, under ordinary conditions, more than counterbalanced by the necessity of carrying the drum and its foundations to a greater depth below the sill of the weir than the height of the weir above it.
The obvious remedy was to throw a weir across each branch of the river to control the water and force it into canals taken from above it.
Weir Smyth's Greek Melic Poets (1900).
The weir is raised ¦ '.'
The barrier was originally formed of a number of long square wooden spars which could be readily handled by one man, being inclined slightly - from the vertical and placed close together for shutting the weir; but panels of wood or sheetiron closing the space between adjacent frames and sliding in grooves at the sides, and rolling-up curtains ?
The weir is opened by joining the needles of each bay by a chain passed through the eyes at the top and a line of wire through the central rings, so that when released at the top by the tilting of the escape bar by the derrick, they float down as a raft, and are caught by a man in a boat, or, when the cur rent is strong, they are 'mopes ?o drawn to the bank by a rope attached to them previously to their release.
The trestles of this weir are, as usual, hinged to the apron, so that in flood-time they can be completely lowered into a recess across the apron by means of chains actuated by a winch, leaving the channel perfectly open for the discharge of floods and for the passage of vessels when the lock is submerged.
- Suspended Frame Weir, Poses, River Seine.
This weir is raised by admitting water under pressure beneath the gates through culverts in connexion with the upper pool; and is lowered by unfastening the raised gates and letting the water under them escape into the lower pool.
8, whereby the pass of a weir 80 ft.
high in each case; and a still larger drum weir was erected about the same time for closing the navigable pass of a weir across the Spree at Charlottenburg, with an upper paddle 324 ft.
wide on the Osage river near its confluence with the Missouri, where a hollow, wooden, cylindrical sector, stiffened inside by iron framing and revolving on an axis laid along the crest of the solid part of the weir, fits into a drum at the back „ vim 4 ..
- Drum Weir, Charlottenburg, River Spree.
In spite of its high cost, the drum weir furnishes a valuable hydraulic contrivance for situations where it is very important to be able to close a weir of moderate height against a strong current and to regulate with ease and precision the discharge past a weir.
Numerous regulating bridges and locks have been built to give absolute control of the water and facilities for navigation; and since 1901 a second weir has been constructed opposite Zilta, across the Damietta branch of the Nile, to improve the irrigation of the Dakhilia province.
The Assiut weir is constructed on a design very similar to that of the barrage in Barrage.
There being at its head no weir across the Nile, the water in the Ibrahimia canal used to rise and fall with that of the river, and so the supply was apt to run short during the hottest months, as was the case with the canals of Lower Egypt before the barrage was built.
Silas Weir Mitchell >>
The normal natural flow in ordinary summer weather is about 350,000,000 gallons a day, and of this, after the companies have taken 130,000,000, only 220,000,000 gallons are left to pass over Teddington Weir.
apart, hinged to a masonry apron on the bed of the river and carrying a foot-bridge along the top, from which the actual barrier, resting against the frames and cross- weir.
bars at the top and a sill at the bottom, is put into place or removed for closing or opening the weir.
[[Section Op Weir.
The drum weirs erected across shallow, regulating passes on the river Marne in1857-1867comprise a series of upper and under wrought-iron paddles, which can make a quarter of a revolution round a central axis laid along the sill of the weir.
high, closing each bay of the weir.
Clearly this raising the level of the water by ro% increases tenfold, or by r000%, the volume of water which is above the level of the weir.
The masonry, Escape weir.
There is a lock 80 metres long and 16 metres wide at the left or western end of the weir, and adjoining it are the regulating sluices of the Ibrahimia canal.
The Assiut weir across the Nile is just about half a mile long.
The money value of the crops saved by the closing of the weir was not less than £E690,000.
The conversion of the lands north of Assiut from basin to perennial irrigation began immediately after the completion of the Assiut weir and was finished by the end of 1908.
In 1898 there were ten of these systems, with an irrigation area, as shown by the accompanying table, of 2,685,915 acres, and a revenue of Rx.1,163,268: In the three great deltas, and the small southern one that depends on the Srivaikuntam weir over the river Tumbraparni, extension and improvement works have been carried on.
high, is decorated with eight historical paintings: "Landing of Columbus" (1492),(1492), by John Vanderlyn; "De Soto discovering the Mississippi" (1541),(1541), by William Henry Powell; "Baptism of Pocahontas" (1613), by John Gadsby Chapman; "Embarkation of the Pilgrims from Delft Haven" (1620), by Robert Walter Weir; "Signing the Declaration of Independence" (1776), by John Trumbull; "Surrender of Burgoyne at Saratoga" (1777), by Trumbull; "Surrender of Cornwallis at Yorktown" (1781), by Trumbull; and "Washington resigning his Commission at Annapolis" (1783),(1783), by Trumbull.
257; Weir, The Shaikhs of Morocco (1904).
Weir Mitchell and others have shown that serpent venom consists chiefly of albumoses, and the toxins formed by infective bacilli have a somewhat similar chemical nature.
To Edward Jenner we owe the discovery that vaccination protects against smallpox, and it is now generally acknowledged that smallpox and vaccine are ' Quoted by Weir Mitchell, "Researches on the Venom of the Rattlesnake," Smithsonian Contributions (1860), p. 97.
In the well-known "rest" cure, which we owe to Weir Mitchell, forced feeding takes a prominent part.
Where nervous exhaustion is less marked and the Weir Mitchell treatment is not appropriate - for example, in men who are simply overworked or broken down by anxiety or sorrow - a sea voyage is often a satisfactory form of "rest" cure.
Another important undertaking begun about the same time was the throwing of an East Indian weir dam (the only one in the United States) across the Colorado near Yuma, and the confinement of both sides of the lower Gila and Colorado with levees.
A minimum thickness must safety be adopted to give substance to the upper part; and where the dam is not used as a weir it must necessarily rise several feet above the water, and may in either event have to carry a roadway.
Where the dam is of masonry it may be used as a weir; but where earthwork is employed, the overflow, commonly known in such a case as the " bye-wash," should be an entirely independent work, consisting of a low weir of sufficient length to prevent an unsafe rise of the water level, and of a narrow channel capable of easily carrying away any water that passes over the weir.
The overflow sill or weir should be a masonry structure of rounded vertical section raised a foot or more above the waste-water course, in which case for a depth of t a ft.
per second per woo acres, such a weir will be 50 ft.
Weir, A Student's Introduction to Critical Philosophy (1906); G.A.
Anthony weir Quiet rain.
crump weir designed to provide for flow measurement.
On the quiet stretch of the river above the weir, a pair of Mute Swans are still accompanied by their two gray cygnets.
downstream of the weir.
Photography: Dave Morgan Mathew Weir ' s exquisitely detailed paintings are based upon little-known sources including 18th century porcelain figurines.
Upstream of the tidal weir, river flow has the greatest impact on flooding.
greyppers and gray wagtails can often be seen near the weir.
Divers injected grout into voids under the weir to stabilize it.
haik by anthony weir Quiet rain.
Daniel Weir used to be a famous - not to say infamous - rock star.
The third member of the Rare team is Karen Weir, who keeps everything moving.
overflow weir above Travis Mill Lock.
Available: Summer 2005 Belfast sink with weir BAK 710 Franke Professional Range standard Belfast sink with traditional weir overflow and 45mm waste.
At age 13, Weir wrote to Jack Nicklaus asking whether he should switch to playing right-handed.
unfinished masterpiece, Weir of Hermiston.
wafting down from Cromwell weir.
A launch is coming down, shooting the weir.
Firstly I had to build a weir across half of the river's width.
About 400 yards downstream from the arched bridge is the lock and a long footbridge which crosses the adjacent weir.
Before the 17 th October this year we hope to have at least another 3 wooden weirs constructed and 1 more stone weir.
There is a small weir at the end with a grade 2 stopper.
weir waste overflow.
weir stream to the side of White Mills Lock.
weir pool at the top of the fishery.
A typical Rochdale overflow weir above Travis Mill Lock.
First posts A line of 10 posts cutting across a channel in Somerset may be part of an ancient salt marsh fish weir.
The Roman road is now shown to have crossed the river 200 meters downstream from the navigation weir.
The Savick Brook is flowing in from the right over a stone weir.
- By the use of the complex variable and its conjugate functions, an attempt can be made to give a mathematical interpretation of problems such as the efflux of water in a jet or of smoke from a chimney, the discharge through a weir, the flow of water through the piers of a bridge, or past the side of a ship, the wind blowing on a sail or aeroplane, or against a wall, or impinging jets of gas or water; cases where a surface of discontinuity is observable, more or less distinct, which separates the running stream from the dead water or air.
The needle weir, so called from the long, slender spars being termed aiguilles in France, had the merit of simplicity in its earliest form; and by means of some ingenious contrivances, comprising a hook, winch, lever and rotating bar, for assisting the weir-keepers in placing and releasing the needles, the system has been applied successfully to the weirs of greater height required on the Meuse, the Main and the Moldau (fig.
The frame weir closed by sliding panels or rolling-up curtains (fig.
The frames hang vertically from the bottom of the overhead bridge, and rest against a sill at the bottom when the weir is in operation, the openings between the frames being closed below the water-level by rolling-up curtains or sliding panels, which are lowered or raised by a travelling winch carried by a small foot-bridge formed by hinged brackets at the p ack of the frames, and situated a little above the highest floodlevel.
by means of chains worked by a winch .2 The shutter weir, introduced on the upper Seine about the middle of the 19th century and subsequently adopted for weirs across several rivers in France, Belgium and the United States, consists of a row of wooden or iron shutters turning on a horizontal axis a little above their centre of pressure, 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 shoe fastened on the apron (fig.
The weir is raised by admitting water from the upper pool into a wedge-shaped space left below the sector when it is lowered in the drum, which by its pressure lifts the sector out of the drum, forming a barrier, 7 ft.
At the time of his death Robert Louis Stevenson was working on his unfinished masterpiece, Weir of Hermiston.
Large " icebergs " of floating foam were wafting down from Cromwell weir.
Firstly I had to build a weir across half of the river 's width.
Finished in a high luster white gloss, complete with a traditionally styled weir waste overflow.
The weir stream to the side of White Mills Lock.
The weir pool at the top of the fishery.
Bob Weir Professional - This 1978 model was made specially for Grateful Dead guitarist Bob Weir.
During the eighth season, Jack O'Neill assumed the head of Stargate command after Elizabeth Weir joined the Atlantis mission.
One episode dealt with the discovery of a very old woman who turned out to be an Elizabth Weir.
The elderly Weir lost her expeditionary force when the city flooded.
This alternate Weir, Sheppard and Zelinka discovered a puddle jumper that had a time traveling capability.
Weir explained to the Ancient scientist Janus what happened and the two conspired against the Ancient Council's wishes to protect the city and save the Expedition when it arrived thousands of years in the future.
This alternate Weir remained in stasis, waking every few hundred years to cycle the ZPMs, conserving power so that the shields would hold until it rose to the surface.
During the third season, the crew mourned the loss of Dr. Beckett and later Dr. Elizabeth Weir.
After season three, Elizabeth Weir was written out to make room for Amanda Tapping's Colonel Samantha Carter.
Dr. Elizabeth Weir (Torri Higgins): The role was originated by actress Jessica Steen in SG-1's two part season seven finale.
A diplomat with extensive experience, Weir was appointed by the President to take control of Stargate Command, a nod to international pressure against U.S. military control.
When the address to the Ancient's abandoned city was discovered, Weir was appointed the head of a multi-national expeditionary force.
Weir led the Atlantis expedition capably until a run-in with Human Form replicators cost her, her life.
Timeline references allow fans to know when the stories take place and can feature familiar faces like Carson, Weir, Todd or Michael as well as Shepherd, McKay, Teyla and Ronon.
This has now been rectified, in the same way as in Lower Egypt, by the construction of a weir across the Nile, intended to Assiut give complete control over the river and to raise the Weir water-surface 8.2 ft.
Among the other lakes are Orange, Crescent, George, Weir, Harris, Eustis, Apopka, Tohopekaliga, Kissimmee and Istokpoga.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.