Quern-stone
Encyclopedia
Rock (geology)
In geology, rock or stone is a naturally occurring solid aggregate of minerals and/or mineraloids.The Earth's outer solid layer, the lithosphere, is made of rock. In general rocks are of three types, namely, igneous, sedimentary, and metamorphic...
tools for hand grinding a wide variety of materials. They were used in pairs. The lower, stationary, stone is called a quern, whilst the upper, mobile, stone is called a handstone. They were first used in the Neolithic
Neolithic
The Neolithic Age, Era, or Period, or New Stone Age, was a period in the development of human technology, beginning about 9500 BC in some parts of the Middle East, and later in other parts of the world. It is traditionally considered as the last part of the Stone Age...
to grind cereals into flour.
Grain
Cereal
Cereals are grasses cultivated for the edible components of their grain , composed of the endosperm, germ, and bran...
to make flour
Flour
Flour is a powder which is made by grinding cereal grains, other seeds or roots . It is the main ingredient of bread, which is a staple food for many cultures, making the availability of adequate supplies of flour a major economic and political issue at various times throughout history...
for bread
Bread
Bread is a staple food prepared by cooking a dough of flour and water and often additional ingredients. Doughs are usually baked, but in some cuisines breads are steamed , fried , or baked on an unoiled frying pan . It may be leavened or unleavened...
-making. They were generally replaced by millstone
Millstone
Millstones or mill stones are used in windmills and watermills, including tide mills, for grinding wheat or other grains.The type of stone most suitable for making millstones is a siliceous rock called burrstone , an open-textured, porous but tough, fine-grained sandstone, or a silicified,...
s once mechanised forms of milling
Mill (grinding)
A grinding mill is a unit operation designed to break a solid material into smaller pieces. There are many different types of grinding mills and many types of materials processed in them. Historically mills were powered by hand , working animal , wind or water...
appeared, particularly the water mill and the windmill
Windmill
A windmill is a machine which converts the energy of wind into rotational energy by means of vanes called sails or blades. Originally windmills were developed for milling grain for food production. In the course of history the windmill was adapted to many other industrial uses. An important...
, although animals were also used to operate the millstones. However, in many non-Westernised, non-mechanised cultures they are still manufactured and used regularly and have only been replaced in many parts of the world in the last century or so.
In early Maya civilization
Maya civilization
The Maya is a Mesoamerican civilization, noted for the only known fully developed written language of the pre-Columbian Americas, as well as for its art, architecture, and mathematical and astronomical systems. Initially established during the Pre-Classic period The Maya is a Mesoamerican...
s the process of nixtamalization
Nixtamalization
Nixtamalization typically refers to a process for the preparation of maize , or other grain, in which the grain is soaked and cooked in an alkaline solution, usually limewater, and hulled. The term can also refer to the removal via an alkali process of the pericarp from other grains such as sorghum...
was distinctive in that hard, ripe kernels of maize (corn) were boiled in water and lime, thus producing nixtamal which was then made into unleavened dough for flat cakes by grinding with a handstone on a quern (metate).
Other materials
As well as grain, ethnographic evidence and Mesopotamian texts shows that a wide range of foodstuffs and inorganic materials were processed using stone querns or mortars, including nuts, seeds, fruit, vegetables, herbs, spices, meat, bark, pigments, temper and clay. Moreover, one study analysing quern-stones noted that a number of querns had traces of arsenicArsenic
Arsenic is a chemical element with the symbol As, atomic number 33 and relative atomic mass 74.92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250.Arsenic is a metalloid...
and bismuth
Bismuth
Bismuth is a chemical element with symbol Bi and atomic number 83. Bismuth, a trivalent poor metal, chemically resembles arsenic and antimony. Elemental bismuth may occur naturally uncombined, although its sulfide and oxide form important commercial ores. The free element is 86% as dense as lead...
, unlike their source rocks, and had levels of antimony
Antimony
Antimony is a toxic chemical element with the symbol Sb and an atomic number of 51. A lustrous grey metalloid, it is found in nature mainly as the sulfide mineral stibnite...
which were ten times higher than those of the rocks. The authors concluded that this was probably due to the use of these querns in the preparation of medicines, cosmetics, dyes or even in the manufacture of alloys.
Querns were widely used in grinding metals ores after mining extraction. The aim was to liberate fine ore particles which could then be separated by washing for example, prior to smelting. They were thus widely used in gold mining
Gold mining
Gold mining is the removal of gold from the ground. There are several techniques and processes by which gold may be extracted from the earth.-History:...
in antiquity.
In the Shetlands tobacco wasn't smoked at first, but ground up into snuff
Snuff
Snuff is a product made from ground or pulverised tobacco leaves. It is an example of smokeless tobacco. It originated in the Americas and was in common use in Europe by the 17th century...
, and inhaled up the nose. Snuff-querns consisted of an upper and lower stone, fixed together by a central iron pivot. The quern was held on the users lap, the eye was filled with dried tobacco leaves and then the upper-stone was turned using the handle. The friction caused by the turning ground the leaves into a fine powder that built up around the edge of the lower-stone. Many snuff-querns had a small hole or cut made near the edge of the upper-stone, into which a pointed end of a lamb's horn was placed in order to turn the stone; an alternative to using a handle.
Incidental uses
There are however, more surprising recorded uses of quern-stones. For example DeBoer, in his review of the traditional gambling games of North American tribes, reports that one of the games involved bouncing a group of split canes off a quern.Violence is recorded in the book of Judges
Book of Judges
The Book of Judges is the seventh book of the Hebrew bible and the Christian Old Testament. Its title describes its contents: it contains the history of Biblical judges, divinely inspired prophets whose direct knowledge of Yahweh allows them to act as decision-makers for the Israelites, as...
(9:53; NRSV): “But a certain woman threw an upper-millstone on Abimelech’s head, and crushed his skull.”
Manufacture of quern-stones
The best type of stone from which to manufacture quern-stones are igneous rocks such as basaltBasalt
Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...
. These have naturally rough surfaces, but grains do not detach easily, so the material being ground does not become gritty. However, such rocks are not always available, meaning that quern-stones have been manufactured from a wide variety of rocks, including sandstone
Sandstone
Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...
, quartzite
Quartzite
Quartzite is a hard metamorphic rock which was originally sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to gray, though quartzites often occur in various shades of pink...
and limestone
Limestone
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....
. Quernmore Crag near Lancaster
Lancaster, Lancashire
Lancaster is the county town of Lancashire, England. It is situated on the River Lune and has a population of 45,952. Lancaster is a constituent settlement of the wider City of Lancaster, local government district which has a population of 133,914 and encompasses several outlying towns, including...
in England is named after the quarrying of millstone grit used to make quern stones in these parts.
Rutter was able to show, for the southern Levant, that basalt quern-stones were preferred to those manufactured from other rock types. Basalt quern-stones were therefore transported over long-distances, leading to argue that, despite their every-day, utilitarian function, they were also used as a status symbol
Status symbol
A status symbol is a perceived visible, external denotation of one's social position and perceived indicator of economic or social status. Many luxury goods are often considered status symbols...
.
Evolution of quern-stones
The earliest forms of quern were the saddle and trough querns. The earliest quern so far discovered dates to c. 9500–9000 BC and was found at Abu Hureyra, Syria. A later development was the rotary quern, which takes several forms.Saddle quern
The saddle quern is produced by rocking or rolling the handstone using parallel motions (i.e., pushing and pulling the handstone), which forms a shape looking like a saddleSaddle
A saddle is a supportive structure for a rider or other load, fastened to an animal's back by a girth. The most common type is the equestrian saddle designed for a horse, but specialized saddles have been created for camels and other creatures...
. These are the most ancient and widely used type of quern-stone. The handstones for saddle querns are generally either roughly cylindrical (not unlike a rolling pin
Rolling pin
thumb|A wooden "roller" type rolling pinA rolling pin is a cylindrical food preparation utensil used to shape and flatten dough. Two styles of rolling pins are found; roller and rods. Roller types consists of a thick cylindrical roller with small handles at each end; rod type rolling pins are...
) and used with both hands, or rough hemispheres and used with one hand. This provides a crushing motion, not a grinding action and is more suitable for crushing malted grain. It is not easy to produce flour from a saddle quern with unmalted grain. The handstone is also referred to as a 'rubber' or 'mouler'.
Rotary hand quern
As the name implies, the rotary quern used circular motions to grind the material, meaning both the quern and the handstone were generally circular. The handstone of a rotary quern is much heavier than that of saddle quern and provides the necessary weight for the grinding of unmalted grain into flour. In some cases the grinding surfaces of the stones fit into each other, the upper stone being slightly concave and the lower one convex.Beehive quern
Disc quern
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...
2,500 years ago and appear to have arrived in maritime Scotland from about 200 BC with people who built the defensive homes known as broch
Broch
A broch is an Iron Age drystone hollow-walled structure of a type found only in Scotland. Brochs include some of the most sophisticated examples of drystone architecture ever created, and belong to the classification "complex Atlantic Roundhouse" devised by Scottish archaeologists in the 1980s....
s. This Iron Age type closely resembles the adjustable Highland quern still in use is historic times.
Garnett in his 1800 tour of Scotland describes the use of a hand quern as follows: "The quern consists of two circular pieces of stone, generally grit or granite, about twenty inches in diameter. In the lower stone is a wooden peg, rounded at the top; on this the upper stone is nicely balanced, so as just to touch the lower one, by means of a piece of wood fixed in a large hole in this upper piece, but which does not fill the hole, room for feeding the mill being left on each side: it is so nicely balanced, that though there is some friction from the contact of the two stones, yet a very small momentum will make it revolve several times, when it has no corn in it. The corn being dried, two women sit down on the ground, having the quern between them; the one feeds it, while the other turns it round, relieving each other occasionally, and singing some Celtic songs all the time."
Other types of quern stones
Other forms of quern-stone include hopper-rubbers and Pompeian mills, both used by the RomansAncient Rome
Ancient Rome was a thriving civilization that grew on the Italian Peninsula as early as the 8th century BC. Located along the Mediterranean Sea and centered on the city of Rome, it expanded to one of the largest empires in the ancient world....
. The larger rotary mills were usually worked by a donkey or horse via an extension arm of wood attached to the upper stone.
Laws against use
There was a legal requirement in ScotlandScotland
Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...
for tenants to pay for use of the baron's mill. Early leases of mills gave to the miller the legal right to break quern-stones which were being used in defiance of thirlage
Thirlage
Thirlage was the term used for the law in regard of the milling of grain for personal or other uses. Vassals in a feudal barony were thirled to their local mill owned by the feudal superior...
agreements.
The obligations of thirlage eventually ceased to apply, but thirlage in Scotland was only formally and totally abolished on 28 November (Martinmas) 2004 by the Abolition of Feudal Tenure etc. (Scotland) Act 2000
Abolition of Feudal Tenure etc. (Scotland) Act 2000
The Abolition of Feudal Tenure etc. Act 2000 was an act of the Scottish Parliament which was passed by the Parliament on 3 May 2000 and received Royal Assent on 9 June 2000....
.
Similar requirements existed and were enforced actively in England.
Ornament and inscription
Three beehive querns found in Ireland have inscribed ornament of La Tène type.A quern was discovered at Dunadd
Dunadd
Dunadd, , is an Iron Age and later hillfort near Kilmartin in Argyll and Bute, Scotland and believed to be the capital of the ancient kingdom of Dál Riata.-Description:...
in Scotland which has a cross carved into the upper stone. The cross has expanded terminals and ultimately derives its form from Roman
Ancient Rome
Ancient Rome was a thriving civilization that grew on the Italian Peninsula as early as the 8th century BC. Located along the Mediterranean Sea and centered on the city of Rome, it expanded to one of the largest empires in the ancient world....
and Byzantine
Byzantine
Byzantine usually refers to the Roman Empire during the Middle Ages.Byzantine may also refer to:* A citizen of the Byzantine Empire, or native Greek during the Middle Ages...
predecessors of the fifth and sixth centuries. This example has a high quality of finishing which reflects its 'cost' and enhances its symbolic value and social significance. The cross is likely to have 'protected' the corn and the resultant flour from evil, such as fungal rust
Rust (fungus)
Rusts are plant diseases caused by pathogenic fungi of the order Pucciniales. About 7800 species are known. Rusts can affect a variety of plants; leaves, stems, fruits and seeds. Rust is most commonly seen as coloured powder, composed off tiny aeciospores which land on vegetation producing...
or ergot
Ergot
Ergot or ergot fungi refers to a group of fungi of the genus Claviceps. The most prominent member of this group is Claviceps purpurea. This fungus grows on rye and related plants, and produces alkaloids that can cause ergotism in humans and other mammals who consume grains contaminated with its...
. Various legends give miraculous power to mill-stones and several have been found which have been re-used in the construction of burial cists or as tomb stones. The association between quern stones and burial may be because they are used in the process of making bread, the staple of life. A broken or disused quern therefore can be seen as symbolic of death. In Clonmacnoise
Clonmacnoise
The monastery of Clonmacnoise is situated in County Offaly, Ireland on the River Shannon south of Athlone....
, near Athlone in County Offaly in Ireland
Ireland
Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...
, a quern stone was found which had been made into a tombstone, having been ornamented and the name Sechnasach, who died in 928 AD, inscribed onto it.
See also
- Scottish Rural Life, History Dictionary
- Sharpening stoneSharpening stoneSharpening stones, water stones or whetstones are used to grind and hone the edges of steel tools and implements. Examples of items that may be sharpened with a sharpening stone include scissors, scythes, knives, razors and tools such as chisels, hand scrapers and plane blades...
External links
- Rutter, G. 2003 Basaltic-rock procurement systems of the southern Levant - Information on basaltic artefacts, including quern-stones. Also includes PDF version of the PhD thesis.
- Atlas of European millstone quarries