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36-559: The Edina Mill was one of the first of six gristmills to be built on the Minnehaha Creek in Hennepin County, Minnesota between 1855 and 1876. Located in present-day Edina , the mill site was discovered during an expedition from Fort Snelling to Lake Minnetonka in 1822. Although the original mill structure was demolished in 1932, its former site is preserved with foundation markers and informational exhibits. In

72-413: A husk. This foundation isolated the building from vibrations coming from the stones and main gearing and also allowed for the easy re-leveling of the foundation to keep the millstones perfectly horizontal. The lower bedstone was placed in an inset in the husk with the upper runner stone above the level of the husk. American inventor Oliver Evans revolutionized the labor-intensive process of early mills at

108-400: A low-grade flour, making up approximately 3% of the original grain, consisting of fractions of endosperm and bran, with an average particle size of 100–300 microns). The middlings include those portions of the wheat kernel that are richest in proteins, vitamins, lipids and minerals. For example, highly refined patent flour may contain only 10 to 12% of the total thiamine and niacin , 20% of

144-412: A mechanical sieve to refine the flour, or turning a wooden drum to wind up a chain used to hoist sacks of grain to the top of the mill house. The distance between the stones can be varied to produce the grade of flour required; moving the stones closer together produces finer flour. This process, which may be automatic or controlled by the miller, is called tentering . The grain is lifted in sacks onto

180-538: A mill on the Minnehaha Creek in present-day Edina. The mill and the tiny settlement that sprang up around it were named Waterville Mills . Pioneer farmers brought their wheat , rye , oats , barley and corn from as far away as Excelsior and St. Anthony . In 1859, the mill was resold to William Rheem and Jonathan T. Grimes who renamed it the Red Mill . They kept the mill running constantly during

216-586: A percentage called the "miller's toll". Early mills in England were almost always built by the local lord of the manor and had the exclusive right (the right of mulcture ) to a proportion on all grain processed in the community. Later, mills were supported by farming communities and the miller received the "miller's toll" in lieu of wages. Most towns and villages had their own mill so that local farmers could easily transport their grain there to be milled. These communities were dependent on their local mill as bread

252-410: A poem written by Scottish poet Robert Burns . Along with the new name, Craik also brought two new products, oatmeal and pearl barley . The Edina Mill was the first in the state of Minnesota to make them and for many years it was the only place in the area to get them. In 1875, George Millam, a Scottish miller hired by Craik shortly after he bought it, purchased the mill from Craik and converted from

288-434: A system that allows the sequential milling of these grists, noting that "a mill, thus constructed, might grind grists in the day time, and do merchant-work at night." Over time, any small, older style flour mill became generally known as a gristmill (as a distinction from large factory flour mills). Modern mills typically use electricity or fossil fuels to spin heavy steel, or cast iron, serrated and flat rollers to separate

324-641: A time, a gas engine was used to grind feed for livestock . However, it didn't work out and the mill came to a halt never to start again. The mill changed hands one more time as Henry F. Brown bought the mill from Millam in 1889. He used the mill to store grain until 1922 when the Thorpe Brothers Realtors bought the site for the development of a new residential community called the Country Club District . On December 1, 1932, despite efforts to preserve it as an historic landmark,

360-531: A useful fodder for livestock and pets. They are also being researched for use as a biofuel . White flour is made entirely from the endosperm or protein/starchy part of the grain, leaving behind the germ and the bran or fiber part. In addition to marketing the bran and germ as products in their own right, middlings include shorts (making up approximately 12% of the original grain, consisting of fractions of endosperm, bran, and germ with an average particle size of 500–900 microns ) and red dog (actually

396-416: A wooden overshot water wheel to turbine power. By 1879, three turbines drove the millstones and other milling machinery. The demise of the mill began in 1895 when a dam was built on the east shore of Gray's Bay on Lake Minnetonka . This dam severely cut the water flow of the Minnehaha Creek, turning it from a racing river to a meandering brook. A last attempt was made to keep the mill running and for

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432-615: Is probably the Barbegal aqueduct and mill where water with a 19-metre fall drove sixteen water wheels , giving a grinding capacity estimated at 28 tons per day. Water mills seem to have remained in use during the post-Roman period. Manually operated mills utilizing a crank-and-connecting rod were used in the Western Han dynasty . There was an expansion of grist-milling in the Byzantine Empire and Sassanid Persia from

468-680: The Civil War making flour requisitioned by the government for the Union Army . In 1867, the mill was again resold to Daniel H. Buckwalter who again changed the name of the mill to the Buckwalter Mill . After only two years Buckwalter sold the mill to a Scotsman named Andrew Craik in 1869. He gave the mill and the city of Edina its present name. Edina was a nickname for his birthplace in Edinburgh , Scotland , that appeared in

504-755: 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. Although the terms "gristmill" or "corn mill" can refer to any mill that grinds grain, the terms were used historically for a local mill where farmers brought their own grain and received ground meal or flour, minus

540-483: The Roman Empire by the end of the first century BC, and these were described by Vitruvius . The rotating mill is considered "one of the greatest discoveries of the human race". It was a very physically demanding job for workers, where the slave workers were considered little different from animals, the miseries of which were depicted in iconography and Apuleius ' The Golden Ass . The peak of Roman technology

576-438: The bran and germ from the endosperm . The endosperm is ground to create white flour, which may be recombined with the bran and germ to create whole grain or graham flour . The different milling techniques produce visibly different results, but can be made to produce nutritionally and functionally equivalent output. Stone-ground flour is preferred by many bakers and natural food advocates because of its texture, nutty flavour, and

612-547: The phosphorus , and 50% of the calcium of the parent grain. The term is somewhat imprecise, as it does not take into account the various mill streams and proportions that are combined and ultimately constitute the product's final composition. As a consequence of this inconsistent terminology, difficulties are encountered when ascertaining nutritional value and establishing economic worth. Wheat midds are sometimes referred to negatively as "floor sweepings" although such products are generally captured long before they would end up on

648-413: The sack floor at the top of the mill on the hoist . The sacks are then emptied into bins, where the grain falls down through a hopper to the millstones on the stone floor below. The flow of grain is regulated by shaking it in a gently sloping trough (the slipper ) from which it falls into a hole in the center of the runner stone. The milled grain (flour) is collected as it emerges through the grooves in

684-488: The " Norse wheel ", as many were found in Scandinavia. 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. This simple arrangement required no gears , but had

720-543: The 3rd century AD onwards, and then the widespread expansion of large-scale factory milling installations across the Islamic world from the 8th century onwards. Geared gristmills were built in the medieval Near East and North Africa , which were used for grinding grain and other seeds to produce meals . Gristmills in the Islamic world were powered by both water and wind. The first wind-powered gristmills were built in

756-592: The 9th and 10th centuries in what are now Afghanistan, Pakistan and Iran. The Egyptian town of Bilbays had a grain-processing factory that produced an estimated 300 tons of flour and grain per day. From the late 10th century onwards, there was an expansion of grist-milling in Northern Europe. 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

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792-901: The belief that it is nutritionally superior and has a better baking quality than steel-roller-milled flour. It is claimed that, as the stones grind relatively slowly, the wheat germ is not exposed to the sort of excessive temperatures that could cause the fat from the germ portion to oxidize and become rancid, which would destroy some of the vitamin content. Stone-milled flour has been found to be relatively high in thiamin, compared to roller-milled flour, especially when milled from hard wheat. Gristmills only grind "clean" grains from which stalks and chaff have previously been removed, but historically some mills also housed equipment for threshing , sorting, and cleaning prior to grinding. Modern mills are usually "merchant mills" that are either privately owned and accept money or trade for milling grains or are owned by corporations that buy unmilled grain and then own

828-436: 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. 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. Vertical wheels were in use in

864-654: The end of the eighteenth century when he automated the process of making flour. His inventions included the Elevator, wood or tin buckets on a vertical endless leather belt, used to move grain and flour vertically upward; the Conveyor, a wooden auger to move material horizontally; the Hopper Boy, a device for stirring and cooling the newly ground flour; the Drill, a horizontal elevator with flaps instead of buckets (similar to

900-406: The floor. When used in feed for livestock or horses , middlings can be a good source of protein , fiber , phosphorus, and other nutrients. Flour milling products arising from a fairly homogeneous parent grain can vary greatly depending on the objectives of the milling process. Thus, the degree of nutrient variation in wheat midds can be a major consideration in determining whether its inclusion in

936-522: The flour produced. One common pest found in flour mills is the Mediterranean flour moth . Moth larvae produce a web-like material that clogs machinery, sometimes causing grain mills to shut down. Wheat middlings Wheat middlings (also known as millfeed , wheat mill run , or wheat midds ) are the product of the wheat milling process that is not flour . A good source of protein , fiber , phosphorus , and other nutrients, they are

972-426: The grinding mechanism or the building that holds it. Grist is grain that has been separated from its chaff in preparation for grinding . 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. The early mills had horizontal paddle wheels, an arrangement which later became known as

1008-594: The mid-1850s, small gristmills began to spring up along several creeks that ran through the land where much of the area's grain was grown. This was a direct result of the fact that prior to these mills, farmers had to haul their grain in horse-drawn wagons over long distances to the mills at Saint Anthony Falls along the Mississippi River . In 1856, Jacob Elliot, Captain Richard Strout, Levi M. Stewart, and Joseph Cushman purchased land and constructed

1044-522: The old mill was demolished. In the summer of 1977, an archeological dig at the old mill site located the exact outlines of the mill's foundation and found several remnants of the mill's equipment. After the search for the artifacts was completed, the mill site was re-landscaped and identified with informational exhibits. Gristmill A gristmill (also: grist mill , corn mill , flour mill , feed mill or feedmill ) grinds cereal grain into flour and middlings . The term can refer to either

1080-496: The old wheel mills. In most wheel-driven mills, a large gear-wheel called the pit wheel is mounted on the same axle as the water wheel and this drives a smaller gear-wheel, the wallower , on a main driveshaft running vertically from the bottom to the top of the building. This system of gearing ensures that the main shaft turns faster than the water wheel, which typically rotates at around 10 rpm . The millstones themselves turn at around 120 rpm . They are laid one on top of

1116-414: The other. The bottom stone, called the bed , is fixed to the floor, while the top stone, the runner , is mounted on a separate spindle, driven by the main shaft. A wheel called the stone nut connects the runner's spindle to the main shaft, and this can be moved out of the way to disconnect the stone and stop it turning, leaving the main shaft turning to drive other machinery. This might include driving

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1152-418: The process. Evans himself did not use the term gristmill to describe his automatic flour mill, which was purpose designed as a merchant mill (he used the more general term "water-mill"). In his book his only reference to "grist" (or "grists") is to the small batches of grain a farmer would bring in to have ground for himself (what would be generally called barter or custom milling). In his book, Evans describes

1188-416: The runner stone from the outer rim of the stones and is fed down a chute to be collected in sacks on the ground or meal floor. A similar process is used for grains such as wheat to make flour, and for maize to make corn meal . In order to prevent vibrations from the millstones shaking the building apart, they were usually placed on a separate timber foundation, not attached to the mill walls, known as

1224-605: The use of a conveyor but easier to build); and the Descender, an endless strap (leather or flannel) in a trough that is angled downward, the strap helps to move the ground flour in the trough. Most importantly, he integrated these into a single continuous process, the overall design later becoming known as the Automatic (or Automated) mill. In 1790 he received the third Federal patent for his process. In 1795 he published "The Young Mill-Wright and Miller’s Guide" which fully described

1260-522: Was a staple part of the diet. Classical mill designs are usually water-powered , though some are powered by the wind or by livestock. In a watermill a sluice gate is opened to allow water to flow onto, or under, a water wheel to make it turn. In most watermills the water wheel was mounted vertically, i.e., edge-on, in the water, but in some cases horizontally (the tub wheel and so-called Norse wheel ). Later designs incorporated horizontal steel or cast iron turbines and these were sometimes refitted into

1296-527: 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 at around 17,000 by 1300. Limited extant examples of gristmills can be found in Europe from the High Middle Ages . An extant well-preserved waterwheel and gristmill on

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