Herr's Mill
by Lisa Wooten
Title
Herr's Mill
Artist
Lisa Wooten
Medium
Photograph - Photographs
Description
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A gristmill (also: grist mill, corn mill or flour mill) grinds grain into flour. The term can refer to both the grinding mechanism and the building that holds it.
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History[edit]
Senenu Grinding Grain, ca. 1352-1336 B.C., The royal scribe Senenu appears here bent over a large grinding stone. This unusual sculpture seems to be an elaborate version of a shabti, a funerary figurine placed in the tomb to work in place of the deceased in the hereafter. Brooklyn Museum
Early history[edit]
Main article: Watermill
See also: List of ancient watermills and List of early medieval watermills
The Greek geographer Strabo reports in his Geography a water-powered grain-mill to have existed near the palace of king Mithradates VI Eupator at Cabira, Asia Minor, before 71 BC.[1]
Grinding mechanism in an old Swedish flour mill
The early mills had horizontal paddle wheels, an arrangement which later became known as the "Norse wheel", as many were found in Scandinavia.[2] The paddle wheel was attached to a shaft which was, in turn, attached to the centre of the millstone called the "runner stone". The turning force produced by the water on the paddles was transferred directly to the runner stone, causing it to grind against a stationary "bed", a stone of a similar size and shape.[2] This simple arrangement required no gears, but had the disadvantage that the speed of rotation of the stone was dependent on the volume and flow of water available and was, therefore, only suitable for use in mountainous regions with fast-flowing streams.[2] This dependence on the volume and speed of flow of the water also meant that the speed of rotation of the stone was highly variable and the optimum grinding speed could not always be maintained.[2]
Vertical wheels were in use in the Roman Empire by the end of the first century BC, and these were described by Vitruvius.[3] The peak of Roman technology is probably the Barbegal aqueduct and mill where water with a 19-metre fall drove sixteen water wheels, giving a grinding capacity estimated at 2.4 to 3.2 tonnes per hour. Water mills seem to have remained in use during the post-Roman period, and by 1000 AD, mills in Europe were rarely more than a few miles apart.
The old water mill at Decew Falls, Niagara Escarpment, St. Catharines, Canada
In England, the Domesday survey of 1086 gives a precise count of England's water-powered flour mills: There were 5,624, or about one for every 300 inhabitants, and this was probably typical throughout western and southern Europe. From this time onward, water wheels began to be used for purposes other than grist milling. In England, the number of mills in operation followed population growth, and peaked around 17,000 by 1300.[4]
Limited extant examples of gristmills can be found in Europe from the High Middle Ages. An extant well-preserved waterwheel and gristmill on the Ebro River in Spain is associated with the Real Monasterio de Nuestra Senora de Rueda, built by the Cistercian monks in 1202. The Cistercians were known for their use of this technology in Western Europe in the period 1100 to 1350.
Geared gristmills were also built in the medieval Near East and North Africa, which were used for grinding grain and other seeds to produce meals.[5] Gristmills in the Islamic world were powered by both water and wind. The first wind-powered gristmills were built in the 9th and 10th centuries in what are now Afghanistan, Pakistan and Iran. A sawmill or lumber mill is a facility where logs are cut into lumber. Prior to the invention of the sawmill, boards were rived (split) and planed, or more often sawn by two men with a whipsaw, one above and another in a saw pit below. The earliest known mechanical mill is the Hierapolis sawmill, a Roman water-powered stone mill at Hierapolis, Asia Minor dating back to the 3rd century AD. Other water-powered mills followed and by the 11th century they were widespread in Spain and North Africa, the Middle East and Central Asia, and in the next few centuries, spread across Europe. The circular motion of the wheel was converted to a reciprocating motion at the saw blade. Generally, only the saw was powered, and the logs had to be loaded and moved by hand. An early improvement was the development of a movable carriage, also water powered, to move the log steadily through the saw blade.
By the time of the Industrial Revolution in the 18th century, the circular saw blade had been invented, and with the development of steam power in the 19th century, a much greater degree of mechanisation was possible. Scrap lumber from the mill provided a source of fuel for firing the boiler. The arrival of railroads meant that logs could be transported to mills rather than mills being built besides navigable waterways. By 1900, the largest sawmill in the world was operated by the Atlantic Lumber Company in Georgetown, South Carolina, using logs floated down the Pee Dee River from the Appalachian Mountains. In the 20th century the introduction of electricity and high technology furthered this process, and now most sawmills are massive and expensive facilities in which most aspects of the work is computerized. Besides the sawn timber, use is made of all the by-products including sawdust, bark, wood chips and wood pellets. The Herr's Mill Covered Bridge is a covered bridge that spans Pequea Creek in Lancaster County, Pennsylvania. It is also sometimes known as Soudersburg Bridge.
The bridge has a double span, wooden, double Burr arch truss design. It is painted red on the outside, the traditional color of Lancaster County covered bridges. Both approaches to the bridge are painted in the traditional white color. The length is 178 feet and the width is 15 feet, this bridge is blocked off and admits no traffic at all. The bridge is in fare condition.
In 1980 it was added to the National Register of Historical Places as structure number 80003537. It is located in Paradise Township on Ronks Road 0.4 km (0.25 mi) south of U.S. Route 300 to the east of Lancaster city.
Herr's Mill Covered Bridge was built in 1844 by Joseph Elliot and Robert Russell at a cost of $1787.It has a double-span, double-arch Burr arch truss construction. In 1875 the bridge was rebuilt by James C. Carpenter at a cost of $1860. The bridge was later bypassed by a new concrete bridge and is now on the private property of the Mill Bridge Village Camping Resort. In 2006, after plans to demolish the bridge were reported, owner Brian Kopan was quoted as saying "The bridge is in fine condition. We�re hoping to keep it as it is. Wikipedia
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September 1st, 2016
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