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105-612: Decimius Magnus Ausonius was born c.  310 in Burdigala (now Bordeaux ), the son of Julius Ausonius ( c.  290  – 378), a physician of Greek ancestry, and Aemilia Aeonia, daughter of Caecilius Argicius Arborius, descended on both sides from established, land-owning Gallo-Roman families of southwestern Gaul . Ausonius was given a strict upbringing by his aunt and grandmother, both named Aemilia. He received an excellent education at Bordeaux and at Toulouse, where his maternal uncle, Aemilius Magnus Arborius ,

210-455: A forge , fulling stocks in a fulling mill and so on. However, in corn mills rotation about a vertical axis was required to drive its stones. The horizontal rotation was converted into the vertical rotation by means of gearing, which also enabled the runner stones to turn faster than the waterwheel. The usual arrangement in British and American corn mills has been for the waterwheel to turn

315-505: A grammaticus (instructor) at a school of rhetoric in Bordeaux and afterwards a rhetor or professor. His teaching attracted many pupils, some of whom became eminent in public life. His most famous pupil was the poet Paulinus , who later became a Christian and Bishop of Nola . After thirty years of that work, Ausonius was summoned by Emperor Valentinian I to teach his son, Gratian , the heir-apparent. When Valentinian took Gratian on

420-467: A humid subtropical climate ( Cfa ). However, the Trewartha climate classification system classifies the city as solely humid subtropical, due to a recent rise in temperatures related – to some degree or another – to climate change and the city's urban heat island . The city enjoys cool to mild, wet winters, due to its relatively southerly latitude , and the prevalence of mild, westerly winds from

525-735: A 2015 online poll. The metropolis has also received awards and rankings by international organizations such as in 1957, Bordeaux was awarded the Europe Prize for its efforts in transmitting the European ideal. In June 2007, the Port of the Moon in historic Bordeaux was inscribed on the UNESCO World Heritage List , for its outstanding architecture and urban ensemble and in recognition of Bordeaux's international importance over

630-571: A bourgeois misappropriation of the Revolution, they executed a great number of Girondists. During the purge, the local Montagnard Section renamed the city of Bordeaux "Commune-Franklin" (Franklin-municipality) in homage to Benjamin Franklin . At the same time, in 1791, a slave revolt broke out at Saint-Domingue (current Haiti ), the most profitable of the French colonies.In the lively era of

735-402: A century beyond the municipal borders of Bordeaux due to the small size of the commune (49 km (19 sq mi)) and urban sprawl . By January 2020 there were 1,376,375 people living in the overall 6,316 km (2,439 sq mi) metropolitan area ( aire d'attraction ) of Bordeaux, only a fifth of whom lived in the city proper. Water mill A watermill or water mill

840-514: A cultural center for exhibitions. In 2007, 40% of the city surface area, located around the Port of the Moon , was listed as World Heritage Site . UNESCO inscribed Bordeaux as "an inhabited historic city, an outstanding urban and architectural ensemble, created in the age of the Enlightenment, whose values continued up to the first half of the 20th century, with more protected buildings than any other French city except Paris". Bordeaux

945-437: A dam on the river above the mill and a more elaborate millpond, sluice gate, mill race and spillway or tailrace. An inherent problem in the overshot mill is that it reverses the rotation of the wheel. If a miller wishes to convert a breastshot mill to an overshot wheel all the machinery in the mill has to be rebuilt to take account of the change in rotation. An alternative solution was the pitchback or backshot wheel. A launder

1050-745: A day. By 610 or 670 AD, the watermill was introduced to Japan via Korean Peninsula . It also became known in Tibet by at least 641 AD. According to Greek historical tradition, India received water-mills from the Roman Empire in the early 4th century AD when a certain Metrodoros introduced "water-mills and baths, unknown among them [the Brahmans] till then". Engineers under the Caliphates adopted watermill technology from former provinces of

1155-452: A horizontal shaft on which is also mounted a large pit wheel . This meshes with the wallower , mounted on a vertical shaft, which turns the (larger) great spur wheel (mounted on the same shaft). This large face wheel , set with pegs, in turn, turned a smaller wheel (such as a lantern gear ) known as a stone nut, which was attached to the shaft that drove the runner stone. The number of runner stones that could be turned depended directly upon

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1260-427: A horizontal water wheel on a vertical axle, and the other with a vertical wheel on a horizontal axle. The oldest of these were horizontal mills in which the force of the water, striking a simple paddle wheel set horizontally in line with the flow turned a runner stone balanced on the rynd which is atop a shaft leading directly up from the wheel. The bedstone does not turn. The problem with this type of mill arose from

1365-608: A mostly rural work process, than the ancient urban-centered literary class had been. By Carolingian times, references to watermills had become "innumerable" in Frankish records. The Domesday Book , compiled in 1086, records 5,624 watermills in England alone. Later research estimates a less conservative number of 6,082 that should be considered a minimum as the northern reaches of England were never properly recorded. In 1300, this number had risen to between 10,000 and 15,000. By

1470-455: A museum as well as a place of exhibitions, shows, movie projections and academic seminars on the theme of wine opened its doors in June 2016. The Laser Mégajoule will be one of the most powerful lasers in the world, allowing fundamental research and the development of the laser and plasma technologies. Some 15,000 people work for the aeronautic industry in Bordeaux. The city has some of

1575-666: A population of 259,809 in 2020 within its small municipal territory of 49 km (19 sq mi), but together with its suburbs and exurbs the Bordeaux metropolitan area had a population of 1,376,375 that same year (Jan. 2020 census), the sixth-most populated in France after Paris , Lyon , Marseille , Lille , and Toulouse . Bordeaux and 27 suburban municipalities form the Bordeaux Metropolis , an indirectly elected metropolitan authority now in charge of wider metropolitan issues. The Bordeaux Metropolis, with

1680-529: A population of 819,604 at the January 2020 census, is the fifth most populated metropolitan council in France after those of Paris , Marseille , Lyon and Lille . Bordeaux is a world capital of wine: many châteaux and vineyards stand on the hillsides of the Gironde , and the city is home to the world's main wine fair, Vinexpo . Bordeaux is also one of the centers of gastronomy and business tourism for

1785-463: A shaft with a horizontal axis to one with a vertical axis. Although to date only a few dozen Roman mills are archaeologically traced, the widespread use of aqueducts in the period suggests that many remain to be discovered. Recent excavations in Roman London, for example, have uncovered what appears to be a tide mill together with a possible sequence of mills worked by an aqueduct running along

1890-420: A single waterwheel driving more than one set of stones was drawn by Henry Beighton in 1723 and published in 1744 by J. T. Desaguliers . The overshot wheel was a later innovation in waterwheels and was around two and a half times more efficient than the undershot. The undershot wheel, in which the main water wheel is simply set into the flow of the mill race, suffers from an inherent inefficiency stemming from

1995-477: A source of water, used to provide additional power to watermills and water-raising machines. Fulling mills, and steel mills may have spread from Al-Andalus to Christian Spain in the 12th century. Industrial watermills were also employed in large factory complexes built in al-Andalus between the 11th and 13th centuries. The engineers of the Islamic world used several solutions to achieve the maximum output from

2100-569: A tributary of the Moselle : ....renowned is Celbis for glorious fish, and that other, as he turns his mill-stones in furious revolutions and drives the shrieking saws through smooth blocks of marble, hears from either bank a ceaseless din... The excerpt sheds new light on the development of Roman technology in using water power for different applications. It is one of the rare references in Roman literature to water mills used to cut stone, but that

2205-408: A vertical-waterwheel via a gear mechanism, and the other equipped with a horizontal-waterwheel without such a mechanism. The former type can be further divided, depending on where the water hits the wheel paddles, into undershot, overshot, breastshot and reverse shot waterwheel mills. The Greeks invented the two main components of watermills, the waterwheel and toothed gearing, and used, along with

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2310-581: A water-powered grain-mill to have existed near the palace of king Mithradates VI Eupator at Cabira , Asia Minor , before 71 BC. The Roman engineer Vitruvius has the first technical description of a watermill, dated to 40/10 BC; the device is fitted with an undershot wheel and power is transmitted via a gearing mechanism . He also seems to indicate the existence of water-powered kneading machines. The Greek epigrammatist Antipater of Thessalonica tells of an advanced overshot wheel mill around 20 BC/10 AD. He praised for its use in grinding grain and

2415-499: A watermill. One solution was to mount them to piers of bridges to take advantage of the increased flow. Another solution was the ship mill, a type of watermill powered by water wheels mounted on the sides of ships moored in midstream . This technique was employed along the Tigris and Euphrates rivers in 10th-century Iraq , where large ship mills made of teak and iron could produce 10 tons of flour from corn every day for

2520-420: A wine glut ( wine lake ) in the generic production, the price squeeze induced by an increasingly strong international competition, and vine pull schemes , the number of growers has recently dropped from 14,000 and the area under vine has also decreased significantly. In the meantime, the global demand for first growths and the most famous labels markedly increased and their prices skyrocketed. The Cité du Vin ,

2625-527: Is a city on the river Garonne in the Gironde department , southwestern France. A port city, it is the capital of the Nouvelle-Aquitaine region, as well as the prefecture of the Gironde department. Its inhabitants are called " Bordelais " (masculine) or " Bordelaises " (feminine). The term "Bordelais" may also refer to the city and its surrounding region. The city of Bordeaux proper had

2730-636: Is a logical consequence of the application of water power to mechanical sawing of stone and presumably wood also. Earlier references to the widespread use of mills occur in Vitruvius in his De Architectura of circa 25 BC, and the Naturalis Historia of Pliny the Elder published in 77 AD. Such applications of mills would multiply after the fall of the empire through the Middle Ages into

2835-686: Is a major centre for business in France as it has the sixth largest metropolitan population in France. It serves as a major regional center for trade, administration, services and industry. The vine was introduced to the Bordeaux region by the Romans, probably in the mid-first century, to provide wine for local consumption, and wine production has been continuous in the region since. Bordeaux wine growing area has about 116,160 hectares (287,000 acres) of vineyards , 57 appellations , 10,000 wine-producing estates (châteaux) and 13,000 grape growers. With an annual production of approximately 960 million bottles,

2940-537: Is a mill that uses hydropower . It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding) , rolling , or hammering . Such processes are needed in the production of many material goods, including flour , lumber , paper , textiles , and many metal products. These watermills may comprise gristmills , sawmills , paper mills , textile mills , hammermills , trip hammering mills, rolling mills , and wire drawing mills. One major way to classify watermills

3045-458: Is a tourism company operating in the Bordeaux wine region. Access to the port from the Atlantic is via the Gironde estuary . Almost nine million tonnes of goods arrive and leave each year. This list includes indigenous Bordeaux-based companies and companies that have major presence in Bordeaux, but are not necessarily headquartered there. In January 2020, there were 259,809 inhabitants in

3150-653: Is by an essential trait about their location: tide mills use the movement of the tide; ship mills are water mills onboard (and constituting) a ship. Watermills impact the river dynamics of the watercourses where they are installed. During the time watermills operate channels tend to sedimentate , particularly backwater . Also in the backwater area, inundation events and sedimentation of adjacent floodplains increase. Over time however these effects are cancelled by river banks becoming higher. Where mills have been removed, river incision increases and channels deepen. There are two basic types of watermills, one powered by

3255-420: Is by wheel orientation (vertical or horizontal), one powered by a vertical waterwheel through a gear mechanism, and the other equipped with a horizontal waterwheel without such a mechanism. The former type can be further subdivided, depending on where the water hits the wheel paddles, into undershot, overshot, breastshot and pitchback (backshot or reverse shot) waterwheel mills. Another way to classify water mills

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3360-515: Is called claret in the United Kingdom. Red wines are generally made from a blend of grapes, and may be made from Cabernet Sauvignon , Merlot , Cabernet Franc , Petit verdot , Malbec , and, less commonly in recent years, Carménère . White Bordeaux is made from Sauvignon blanc , Sémillon , and Muscadelle . Sauternes is a sub-region of Graves known for its intensely sweet, white, dessert wines such as Château d'Yquem . Because of

3465-803: Is carried out in the UK at Daniels Mill , Little Salkeld Mill and Redbournbury Mill . This was boosted to overcome flour shortages during the Covid pandemic. Some old mills are being upgraded with modern hydropower technology, such as those worked on by the South Somerset Hydropower Group in the UK. In some developing countries, watermills are still widely used for processing grain. For example, there are thought to be 25,000 operating in Nepal, and 200,000 in India. Many of these are still of

3570-524: Is located close to the European Atlantic coast, in the southwest of France and in the north of the Aquitaine region. It is around 500 km (310 mi) southwest of Paris. The city is built on a bend of the river Garonne , and is divided into two parts: the right bank to the east and left bank in the west. Historically the left bank is more developed because when flowing outside the bend,

3675-428: Is the tide mill . This mill might be of any kind, undershot, overshot or horizontal but it does not employ a river for its power source. Instead a mole or causeway is built across the mouth of a small bay. At low tide, gates in the mole are opened allowing the bay to fill with the incoming tide. At high tide the gates are closed, trapping the water inside. At a certain point a sluice gate in the mole can be opened allowing

3780-502: Is the preeminent role of France in the introduction of new innovative uses of waterpower. However, he has drawn attention to the dearth of studies of the subject in several other countries. The waterwheel was found in China from 30 AD onwards, when it was used to power trip hammers , the bellows in smelting iron , and in one case, to mechanically rotate an armillary sphere for astronomical observation (see Zhang Heng ). Although

3885-474: The Aurelian walls in the late 3rd century. A breastshot wheel mill dating to the late 2nd century AD was excavated at Les Martres-de-Veyre , France. The 3rd century AD Hierapolis water-powered stone sawmill is the earliest known machine to incorporate the mechanism of a crank and connecting rod . Further sawmills, also powered by crank and connecting rod mechanisms, are archaeologically attested for

3990-534: The Byzantine Empire , having been applied for centuries in those provinces prior to the Muslim conquests , including modern-day Syria , Jordan , Israel , Algeria , Tunisia , Morocco , and Spain (see List of ancient watermills ). The industrial uses of watermills in the Islamic world date back to the 7th century, while horizontal-wheeled and vertical-wheeled watermills were both in widespread use by

4095-604: The House of Poitiers ) brought continuity of government. From the 12th to the 15th century, Bordeaux flourished once more following the marriage of Eléonore , Duchess of Aquitaine and the last of the House of Poitiers , to Henry II Plantagenêt , Count of Anjou and the grandson of Henry I of England , who succeeded to the English crown months after their wedding, bringing into being the vast Angevin Empire , which stretched from

4200-454: The Pyrenees to Ireland. After granting a tax-free trade status with England, Henry was adored by the locals as they could be even more profitable in the wine trade, their main source of income, and the city benefited from imports of cloth and wheat. The belfry (Grosse Cloche) and city cathedral St-André were built, the latter in 1227, incorporating the artisan quarter of Saint-Paul. Under

4305-473: The Roman Empire . So-called 'Greek Mills' used water wheels with a horizontal wheel (and vertical shaft). A "Roman Mill" features a vertical wheel (on a horizontal shaft). Greek style mills are the older and simpler of the two designs, but only operate well with high water velocities and with small diameter millstones. Roman style mills are more complicated as they require gears to transmit the power from

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4410-597: The Romans , undershot, overshot and breastshot waterwheel mills. The earliest evidence of a water-driven wheel appears in the technical treatises Pneumatica and Parasceuastica of the Greek engineer Philo of Byzantium (ca. 280−220 BC). The British historian of technology M.J.T. Lewis has shown that those portions of Philo of Byzantium's mechanical treatise which describe water wheels and which have been previously regarded as later Arabic interpolations, actually date back to

4515-548: The Sui dynasty (581–618 AD) was said to operate hundreds of them by the beginning of the 6th century. A source written in 612 AD mentions Buddhist monks arguing over the revenues gained from watermills. The Tang dynasty (618–907 AD) 'Ordinances of the Department of Waterways' written in 737 AD stated that watermills should not interrupt riverine transport and in some cases were restricted to use in certain seasons of

4620-550: The Tigurini led by Divico . The Romans were defeated and their commander, the consul Lucius Cassius Longinus , was killed in battle. The city came under Roman rule around 60 BC, and it became an important commercial centre for tin and lead . During this period were built the amphitheatre and the monument Les Piliers de Tutelle . In 276 AD, it was sacked by the Vandals . The Vandals attacked again in 409, followed by

4725-674: The Visigoths in 414, and the Franks in 498, and afterwards the city fell into a period of relative obscurity. In the late 6th century AD the city re-emerged as the seat of a county and an archdiocese within the Merovingian kingdom of the Franks , but royal Frankish power was never strong. The city started to play a regional role as a major urban center on the fringes of the newly founded Frankish Duchy of Vasconia . Around 585 Gallactorius

4830-512: The ancient world ". It featured 16 overshot waterwheels to power an equal number of flour mills. The capacity of the mills has been estimated at 4.5 tons of flour per day, sufficient to supply enough bread for the 12,500 inhabitants occupying the town of Arelate at that time. A similar mill complex existed on the Janiculum hill, whose supply of flour for Rome 's population was judged by emperor Aurelian important enough to be included in

4935-632: The granary in Baghdad . More than 300 watermills were at work in Iran till 1960. Now only a few are still working. One of the famous ones is the water mill of Askzar and the water mill of the Yazd city, still producing flour. Typically, water is diverted from a river or impoundment or mill pond to a turbine or water wheel, along a channel or pipe (variously known as a flume , head race, mill race , leat , leet, lade (Scots) or penstock ). The force of

5040-416: The modern era . The mills at Barbegal , in southern France , are famous for their application of water power to grinding grain to make flour and were built in the 1st century AD. They consisted of 16 mills in a parallel sequence on a hill near Arles . The construction of a saw mill is even simpler than a flour or grinding mill since no gearing is needed, and the rotary saw blade can be driven directly from

5145-425: The "nest of his old age", and there, he spent the rest of his days, composing poetry and writing to many eminent contemporaries, several of whom had been his pupils. His estates supposedly included the land now owned by Château Ausone , which takes its name from him. Ausonius appears to have been a late and perhaps not very enthusiastic convert to Christianity . He died about 395. His grandson, Paulinus of Pella ,

5250-471: The 18th century, Bordeaux emerged as a center of economic activity, particularly known at first for its successful wine trade. The city's placement along the Gironde River was very strategic, helping to facilitate the transportation of produce to markets both internationally and domestically, which led to an increase in exports and Bordeaux's economic prosperity. There was a significant transformation to

5355-547: The 6th century AD water-powered stone sawmills at Gerasa and Ephesus . Literary references to water-powered marble saws in what is now Germany can be found in Ausonius 4th century AD poem Mosella . They also seem to be indicated about the same time by the Christian saint Gregory of Nyssa from Anatolia , demonstrating a diversified use of water-power in many parts of the Roman Empire . The earliest turbine mill

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5460-614: The 9th century. A variety of industrial watermills were used in the Islamic world, including gristmills , hullers , sawmills , ship mills, stamp mills , steel mills , sugar mills , and tide mills . By the 11th century, every province throughout the Islamic world had these industrial watermills in operation, from al-Andalus and North Africa to the Middle East and Central Asia . Muslim and Middle Eastern Christian engineers also used crankshafts and water turbines , gears in watermills and water-raising machines , and dams as

5565-452: The Atlantic. Its summers are warm and somewhat drier, although wet enough to avoid a Mediterranean classification. Frosts occur annually, but snowfall is quite infrequent, occurring for no more than 3–4 days a year. The summer of 2003 set a record with an average temperature of 23.3 °C (73.9 °F), while February 1956 was the coldest month on record with an average temperature of −2.00 °C at Bordeaux Mérignac-Airport. Bordeaux

5670-511: The Bordeaux area produces large quantities of everyday wine as well as some of the most expensive wines in the world. Included among the latter are the area's five premier cru ( First Growth ) red wines (four from Médoc and one, Château Haut-Brion , from Graves ), established by the Bordeaux Wine Official Classification of 1855 : Both red and white wines are made in the Bordeaux region. Red Bordeaux wine

5775-461: The British chemist and sinologist Joseph Needham speculates that the water-powered millstone could have existed in Han China by the 1st century AD, there is no sufficient literary evidence for it until the 5th century AD. In 488 AD, the mathematician and engineer Zu Chongzhi had a watermill erected which was inspected by Emperor Wu of Southern Qi (r. 482–493 AD). The engineer Yang Su of

5880-575: The German campaigns of 368–369, Ausonius accompanied them. Ausonius turned literary skill into political capital. In recognition of his services emperor Valentinian bestowed on Ausonius the rank of quaestor . His presence at court gave Ausonius the opportunity to connect with a number of influential people. In 369, he met Quintus Aurelius Symmachus ; their friendship proved mutually beneficial. Gratian liked and respected his tutor, and when he became emperor in 375, he began bestowing on Ausonius and his family

5985-539: The Greek 3rd century BC original. The sakia gear is, already fully developed, for the first time attested in a 2nd-century BC Hellenistic wall painting in Ptolemaic Egypt . Lewis assigns the date of the invention of the horizontal-wheeled mill to the Greek colony of Byzantium in the first half of the 3rd century BC, and that of the vertical-wheeled mill to Ptolemaic Alexandria around 240 BC. The Greek geographer Strabo reports in his Geography

6090-412: The Moon supplied the majority of Europe with coffee, cocoa, sugar, cotton and indigo, becoming France's busiest port and the second busiest port in the world after London. Many downtown buildings (about 5,000), including those on the quays, are from this period. Bordeaux was also a major trading centre for slaves. In total, the Bordeaux shipowners deported 150,000 Africans in some 500 expeditions. At

6195-814: The Portuguese consul-general, Aristides de Sousa Mendes , who illegally granted thousands of Portuguese visas, which were needed to pass the Spanish border, to refugees fleeing the German occupation. From 1941 to 1943, the Italian Royal Navy established BETASOM , a submarine base at Bordeaux. Italian submarines participated in the Battle of the Atlantic from that base, which was also a major base for German U-boats as headquarters of 12th U-boat Flotilla . The massive, reinforced concrete U-boat pens have proved impractical to demolish and are now partly used as

6300-705: The Roman Empire that "the poetical fame of Ausonius condemns the taste of his age". However, Ausonius's works have several points of interest: Collige, virgo, rosas, dum flos novus et nova pubes et memor esto aevum sic properare tuum. Gather, girl, roses while the flower is fresh and fresh is youth, remembering that your own time is hurrying on. Itque reditque viam totiens | uteroque recusso transadigit costas | et pectine pulsat eburno. Iamque fere spatio extremo fessique sub ipsam finem adventabant: | tum creber anhelitus artus aridaque ora quatit, sudor fluit undique rivis, labitur exsanguis, | destillat ab inguine virus. Back and forth he plies his path and,

6405-477: The beginning of the Franco-Prussian war against Prussia , the French government temporarily relocated to Bordeaux from Paris. That recurred during World War I and again very briefly during World War II , when it became clear that Paris would fall into German hands. During World War II, Bordeaux fell under German occupation . In May and June 1940, Bordeaux was the site of the life-saving actions of

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6510-598: The beginning of the French Revolution (1789), many local revolutionaries were members of the Girondists . This Party represented the provincial bourgeoisie, favorable towards abolishing aristocracy privileges, but opposed to the Revolution's social dimension. The Gironde valley's economic value and significance was satiated by the city's commercial power which was in dire contrast to the emerging widespread poverty affecting its inhabitants. Trade and commerce were

6615-630: The biggest companies including Dassault , EADS Sogerma , Snecma , Thales , SNPE, and others. The Dassault Falcon private jets are built there as well as the military aircraft Rafale and Mirage 2000 , the Airbus A380 cockpit , the boosters of Ariane 5 , and the M51 SLBM missile . Tourism, especially wine tourism , is a major industry. Globelink.co.uk mentioned Bordeaux as the best tourist destination in Europe in 2015. Gourmet Touring

6720-416: The buckets fill, the weight of the water starts to turn the wheel. The water spills out of the bucket on the down side into a spillway leading back to river. Since the wheel itself is set above the spillway, the water never impedes the speed of the wheel. The impulse of the water on the wheel is also harnessed in addition to the weight of the water once in the buckets. Overshot wheels require the construction of

6825-560: The capital city (along with Bourges in the north). During the last stage of the war against Aquitaine (760–768), it was one of Waifer's last important strongholds to fall to the troops of King Pepin the Short . Charlemagne built the fortress of Fronsac ( Frontiacus , Franciacus ) near Bordeaux on a hill across the border with the Basques ( Wascones ), where Basque commanders came and pledged their loyalty (769). In 778, Seguin (or Sihimin)

6930-411: The cavity reverberating, thrusts between the bones, and strikes with ivory quill. And now, their journey covered, wearily they neared their very goal: then rapid breathing shakes his limbs and parched mouth, his sweat in rivers flows; down he slumps bloodless; the fluid drips from his groin. His writings are also remarkable for mentioning in passing the working of a water mill sawing marble on

7035-423: The city proper (commune) of Bordeaux. The commune (including Caudéran which was annexed by Bordeaux in 1965) had its largest population of 284,494 at the 1954 census. The majority of the population is French, but there are sizable groups of Italians, Spaniards (Up to 20% of the Bordeaux population claim some degree of Spanish heritage), Portuguese , Turks , Germans . The built-up area has grown for more than

7140-454: The date of the earliest tide mills, all of which were discovered on the Irish coast: A 6th century vertical-wheeled tide mill was located at Killoteran near Waterford . A twin flume horizontal-wheeled tide mill dating to c. 630 was excavated on Little Island . Alongside it, another tide mill was found which was powered by a vertical undershot wheel. The Nendrum Monastery mill from 787

7245-536: The draining water to drive a mill wheel or wheels. This is particularly effective in places where the tidal differential is very great, such as the Bay of Fundy in Canada where the tides can rise fifty feet, or the now derelict village of Tide Mills, East Sussex . The last two examples in the United Kingdom which are restored to working conditions can be visited at Eling , Hampshire and at Woodbridge , Suffolk . Run of

7350-487: The driving factors in the region's economic prosperity, still this resulted in a significant number of locals struggling to survive on a daily basis due to lack of food and resources. This socioeconomic disparity served as fertile ground for discontent, sparking frequent episodes of mass unrest well before the tumultuous events of 1783. [1] In 1793, the Montagnards led by Robespierre and Marat came to power. Fearing

7455-458: The early 7th century, watermills were also well established in Ireland . A century later they began to spread across the former Roman Rhine and Danube frontier into the other parts of Germany . Ship mills and tide mills , both of which yet unattested for the ancient period, were introduced in the 6th century. In recent years, a number of new archaeological finds has consecutively pushed back

7560-492: The earth, we taste again the golden age . The Roman encyclopedist Pliny mentions in his Naturalis Historia of around 70 AD water-powered trip hammers operating in the greater part of Italy. There is evidence of a fulling mill in 73/74 AD in Antioch , Roman Syria . The 2nd century AD multiple mill complex of Barbegal in southern France has been described as "the greatest known concentration of mechanical power in

7665-493: The economic landscape of Bordeaux in 1785, which was spurred by the attraction of large profits, traders and merchants in Bordeaux began to turn their attention to the slave trade. This was a very important moment in the city's economic history seeing as it diversified its commercial expansion, at a serious moral cost. This introduced a new layer of difficulty to Bordeaux's economic activities. Even though it brought along significant wealth to certain segments of society, it complicated

7770-421: The fact that the wheel itself, entering the water behind the main thrust of the flow driving the wheel, followed by the lift of the wheel out of the water ahead of the main thrust, actually impedes its own operation. The overshot wheel solves this problem by bringing the water flow to the top of the wheel. The water fills buckets built into the wheel, rather than the simple paddle wheel design of undershot wheels. As

7875-500: The first bridge of Bordeaux, and customs warehouses. The shipping traffic grew through the new African colonies . Georges-Eugène Haussmann , a longtime prefect of Bordeaux, used Bordeaux's 18th-century large-scale rebuilding as a model when he was asked by Emperor Napoleon III to transform the quasi-medieval Paris into a "modern" capital that would make France proud. Victor Hugo found the town so beautiful he said: "Take Versailles , add Antwerp , and you have Bordeaux". In 1870, at

7980-477: The highest Roman honour. In 383, the army of Britain, led by Magnus Maximus , revolted against Gratian and assassinated him at Lyons; and when Emperor Valentinian II was driven out of Italy, Ausonius retired to his estates near Burdigala (now Bordeaux), in Gaul. Magnus Maximus was overthrown by Emperor Theodosius I in 388, but Ausonius did not leave his country estates. They were, he says, his nidus senectutis ,

8085-466: The highest civil honors. That year Ausonius was made Praetorian Prefect of Gaul, campaigned against the Alemanni and received as part of his booty a slave girl, Bissula (to whom he addressed a poem), and his father, though nearly ninety years old, was given the rank of prefect of Illyricum. In 376 Ausonius's son, Hesperius , was made proconsul of Africa. In 379 Ausonius was awarded the consulate ,

8190-530: The lack of gearing; the speed of the water directly set the maximum speed of the runner stone which, in turn, set the rate of milling. Most watermills in Britain and the United States of America had a vertical waterwheel, one of four kinds: undershot, breast-shot, overshot and pitchback wheels. This vertical produced rotary motion around a horizontal axis, which could be used (with cams) to lift hammers in

8295-608: The last 2000 years. Bordeaux is also ranked as a Sufficiency city by the Globalization and World Cities Research Network . Around 300 BC, the region was the settlement of a Celtic tribe , the Bituriges Vivisci , who named the town Burdigala , probably of Aquitanian origin. In 107 BC, the Battle of Burdigala was fought by the Romans who were defending the Allobroges , a Gallic tribe allied to Rome, and

8400-619: The manumission law but lost the war against the army of former slaves. In 1804, Haiti became independent. The loss of this "Pearl" of the West Indies generated the collapse of Bordeaux's port economy, which was dependent on the colonial trade and trade in slaves. Towards the end of the Peninsular War of 1814, the Duke of Wellington sent William Beresford with two divisions and seized Bordeaux, encountering little resistance. Bordeaux

8505-758: The mouth of the Garonne from the Vikings when they appeared in c. 844. In Autumn 845, the Vikings were raiding Bordeaux and Saintes, count Seguin II marched on them but was captured and executed. Although the port of Bordeaux was a buzzing trade center, the stability and success of the city was threatened by Viking and Norman incursions and political instability. The restoration of the Ramnulfid Dukes of Aquitaine under William IV and his successors (known as

8610-420: The organization of international congresses. It is a central and strategic hub for the aeronautics, military and space sector, home to major companies such as Dassault Aviation , ArianeGroup , Safran and Thales . The link with aviation dates back to 1910, the year the first airplane flew over the city. A crossroads of knowledge through university research, it is home to one of the only two megajoule lasers in

8715-627: The power available for British grain milling. By the early 20th century, availability of cheap electrical energy made the watermill obsolete in developed countries although some smaller rural mills continued to operate commercially later throughout the century. A few historic mills such as the Water Mill , Newlin Mill and Yates Mill in the US and The Darley Mill Centre in the UK still operate for demonstration purposes. Small-scale commercial production

8820-608: The power from a toothed annular ring that is mounted near the outer edge of the wheel. This drives the machinery using a spur gear mounted on a shaft rather than taking power from the central axle . However, the basic mode of operation remains the same; gravity drives machinery through the motion of flowing water . Toward the end of the 19th century, the invention of the Pelton wheel encouraged some mill owners to replace over- and undershot wheels with Pelton wheel turbines driven through penstocks . A different type of watermill

8925-465: The reduction of human labour: Hold back your hand from the mill, you grinding girls; even if the cockcrow heralds the dawn, sleep on. For Demeter has imposed the labours of your hands on the nymphs , who leaping down upon the topmost part of the wheel, rotate its axle; with encircling cogs, it turns the hollow weight of the Nisyrian millstones . If we learn to feast toil-free on the fruits of

9030-448: The river schemes do not divert water at all and usually involve undershot wheels the mills are mostly on the banks of sizeable rivers or fast flowing streams. Other watermills were set beneath large bridges where the flow of water between the stanchions was faster. At one point London bridge had so many water wheels beneath it that bargemen complained that passage through the bridge was impaired. In 1870 watermills still produced 2/3 of

9135-633: The side of the River Fleet . In 537 AD, ship mills were ingeniously used by the East Roman general Belisarius , when the besieging Goths cut off the water supply for those mills. These floating mills had a wheel that was attached to a boat moored in a fast flowing river. The surviving evidence for watermills sharply increases with the emergence of documentary genres such as monastic charters , Christian hagiography and Germanic legal codes . These were more inclined to address watermilling,

9240-583: The socio-economic inconsistencies within the region. The entry into the slave trade brought even more tension within Bordeaux society. The trade exacerbated the divide between an elite with growing wealth and those living in poverty. This economic divide laid out the foundation for the mass unrest that would break out in the French Revolution. [2] Three years later, the Montagnard Convention abolished slavery. In 1802, Napoleon revoked

9345-406: The supply of water available. As waterwheel technology improved mills became more efficient, and by the 19th century, it was common for the great spur wheel to drive several stone nuts, so that a single water wheel could drive as many as four stones. Each step in the process increased the gear ratio which increased the maximum speed of the runner stone. Adjusting the sluice gate and thus the flow of

9450-692: The terms of the Treaty of Brétigny it became briefly the capital of an independent state (1362–1372) under Edward, the Black Prince , but after the Battle of Castillon (1453) it was annexed by France. In 1462, Bordeaux created a local parliament. Bordeaux adhered to the Fronde , being effectively annexed to the Kingdom of France only in 1653, when the army of Louis XIV entered the city. The 18th century saw another golden age of Bordeaux. The Port of

9555-536: The water makes a furrow of the required depth to allow the passing of merchant ships, which used to offload on this side of the river. But, today, the right bank is developing, including new urban projects. In Bordeaux, the Garonne River is accessible to ocean liners through the Gironde estuary . The right bank of the Garonne is a low-lying, often marshy plain. Bordeaux's climate can be classified as oceanic ( Köppen climate classification Cfb ), bordering on

9660-486: The water past the main wheel allowed the miller to compensate for seasonal variations in the water supply. Finer speed adjustment was made during the milling process by tentering , that is, adjusting the gap between the stones according to the water flow, the type of grain being milled, and the grade of flour required. In many mills (including the earliest) the great spur wheel turned only one stone, but there might be several mills under one roof. The earliest illustration of

9765-432: The water wheel axle, as the example of Sutter's Mill , California , shows. However, a different mechanism is shown by the sawmill at Hieropolis , Asia Minor , involving a frame saw that is operated by a crank and connecting rod. Burdigala Bordeaux ( / b ɔːr ˈ d oʊ / bor- DOH ; French: [bɔʁdo] ; Gascon Occitan : Bordèu [buɾˈðɛw] ; Basque : Bordele )

9870-596: The water's movement drives the blades of a wheel or turbine, which in turn rotates an axle that drives the mill's other machinery. Water leaving the wheel or turbine is drained through a tail race, but this channel may also be the head race of yet another wheel, turbine or mill. The passage of water is controlled by sluice gates that allow maintenance and some measure of flood control; large mill complexes may have dozens of sluices controlling complicated interconnected races that feed multiple buildings and industrial processes. Watermills can be divided into two kinds, one with

9975-481: The world, as well as a university population of more than 130,000 students within the Bordeaux Metropolis. Bordeaux is an international tourist destination for its architectural and cultural heritage with more than 362 historic monuments , making it, after Paris, the city with the most listed or registered monuments in France. The "Pearl of Aquitaine" has been voted European Destination of the year in

10080-456: The year. From other Tang-era sources of the 8th century, it is known that these ordinances were taken very seriously, as the government demolished many watermills owned by great families, merchants, and Buddhist abbeys that failed to acknowledge ordinances or meet government regulations. A eunuch serving Emperor Xuanzong of Tang (r. 712–756 AD) owned a watermill by 748 AD which employed five waterwheels that ground 300 bushels of wheat

10185-570: Was a professor. Ausonius did well in grammar and rhetoric, but professed that his progress in Greek was unsatisfactory. In 328 Arborius was summoned to Constantinople to become tutor to Constans , the youngest son of Constantine the Great, whereupon Ausonius returned to Bordeaux to complete his education under the rhetorician Minervius Alcimus. Having completed his studies, he trained for some time as an advocate, but he preferred teaching. In 334 he became

10290-539: Was also a poet. His works attest to the devastation that Ausonius's Gaul would face soon after his death. Although admired by his contemporaries, the writings of Ausonius have not since been ranked among Latin literature 's finest. His style is easy and fluent, and his Mosella is appreciated for its evocation of the life and the country along the River Moselle , but he is considered derivative and unoriginal. Edward Gibbon pronounced in his Decline and Fall of

10395-592: Was appointed count of Bordeaux, probably undermining the power of the Duke Lupo , and possibly leading to the Battle of Roncevaux Pass . In 814, Seguin was made Duke of Vasconia , but was deposed in 816 for failing to suppress a Basque rebellion. Under the Carolingians , sometimes the Counts of Bordeaux held the title concomitantly with that of Duke of Vasconia . They were to keep the Basques in check and defend

10500-782: Was defeated he had enough troops to engage in the Battle of Poitiers and so retain his grip on Aquitaine. In 737, following his father Eudes's death, the Aquitanian duke Hunald led a rebellion to which Charles responded by launching an expedition that captured Bordeaux. However, it was not retained for long, during the following year the Frankish commander clashed in battle with the Aquitanians but then left to take on hostile Burgundian authorities and magnates. In 745 Aquitaine faced another expedition where Charles's sons Pepin and Carloman challenged Hunald's power and defeated him. Hunald's son Waifer replaced him and confirmed Bordeaux as

10605-509: Was found in Chemtou and Testour , Roman North Africa , dating to the late 3rd or early 4th century AD. A possible water-powered furnace has been identified at Marseille , France. Mills were commonly used for grinding grain into flour (attested by Pliny the Elder ), but industrial uses as fulling and sawing marble were also applied. The Romans used both fixed and floating water wheels and introduced water power to other provinces of

10710-537: Was largely anti- Bonapartist and the majority supported the Bourbons . The British troops were treated as liberators. Distinguished historian of the French revolution Suzanne Desan explains that "examining intricate local dynamics" is essential to studying the Revolution by region. [3] From the Bourbon Restoration , the economy of Bordeaux was rebuilt by traders and shipowners. They engaged to construct

10815-632: Was made Count of Bordeaux and fought the Basques . In 732, the city was plundered by the troops of Abd er Rahman who stormed the fortifications and overwhelmed the Aquitanian garrison. Duke Eudes mustered a force to engage the Umayyads , eventually engaging them in the Battle of the River Garonne somewhere near the river Dordogne . The battle had a high death toll, and although Eudes

10920-436: Was placed at the end of the flume on the headrace, this turned the direction of the water without much loss of energy, and the direction of rotation was maintained. Daniels Mill near Bewdley , Worcestershire is an example of a flour mill that originally used a breastshot wheel, but was converted to use a pitchback wheel. Today it operates as a breastshot mill. Larger water wheels (usually overshot steel wheels) transmit

11025-637: Was situated on an island in Strangford Lough in Northern Ireland . Its millstones are 830 mm in diameter and the horizontal wheel is estimated to have developed 7 ⁄ 8 horsepower (650 W) at its peak. Remains of an earlier mill dated at 619 were also found at the site. In a 2005 survey the scholar Adam Lucas identified the following first appearances of various industrial mill types in Western Europe. Noticeable

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