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A weir is a small overflow-type dam commonly used to raise the level of a small river or stream. Weirs have traditionally been used to create mill ponds in such places. Water flows over the top of a weir, although some weirs have sluice gates which release water at a level below the top of the weir. The crest of an overflow spillway on a large dam is often called a weir.
Weirs are used in conjunction with locks to render a river navigable. In this case, the weir is made significantly longer than the width of the river by forming it in a 'U' shape or running it diagonally. This is done in order to minimize fluctuation in the depth of the river upstream, with changes in the flow rate of the river. Doing so avoids unnecessary complication in designing and using the lock.
Weirs also give hydrologists and engineers a simple method of measuring the rate of fluid flow in small to medium sized streams. Since the geometry of the top of the weir is known, and all water flows over the weir, the depth of water flowing over the weir will be an indication of the flow. There are different types of weir, they may be a simple metal plate with a V notch cut into it or it may be a concrete and steel structure across the bed of a river. A v-notch weir will give a more accurate indication of low flow rates.
More on [ Weir ]
American Impressionism :: Impressionism
Adelson Galleries, Inc - Gallery with a special focus in the art of the later 19th century and early 20th century provides biography and catalogue of works by Julian Alden Weir.
ARC - Julian Alden Weir - Art works featured include Midsummer Landscape, Little Lizie Lynch, The Letter and The Building of the Dam. Includes date, medium and painting size.
Meta Description: [ Julian Alden Weir (b.1852-d.1919). Art-works featured on this page include: Midsummer Landscape,Little Lizie Lynch,The Bridge: Nocturne,The Letter,The Building of the Dam,The Blue Gown,Ravine near Branchville,Upland Pasture,After the Ride,At the Piano ]
Fine Arts Museums of San Francisco - ImageBase - Display of artist's paintings and etchings; provides a zoom option for detailed viewing.
Julian Alden Weir - National Gallery of Art provides a biography of the artist as well as detail images and exhibition history of various art works.
National Park Service - Weir Farm - Information on the historic site owned by the artist for 37 years. Includes visiting artist, residency and lecture programs offered by the Weir Trust
Smithsonian American Art Museum - Provides artist's biography and a large catalogue of paintings and etchings. Includes images and art work details.
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The Athenaeum - Provides a display of the artworks of Julian Alden Weir, sorted in alphabetical order by title.
