Wheal Martyn
   HOME

TheInfoList



OR:

The Wheal Martyn China Clay Museum is a museum of
china clay Kaolinite ( ; also called kaolin) is a clay mineral, with the chemical composition aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, OH)4. It is a layered silicate mineral, with one tetrahedron, tetrahedral sheet of silica () linked through oxygen ...
mining Mining is the Resource extraction, extraction of valuable geological materials and minerals from the surface of the Earth. Mining is required to obtain most materials that cannot be grown through agriculture, agricultural processes, or feasib ...
, at Carthew, on the B3274 road about north of
St Austell Saint Austell (, ; ) is a town in Cornwall, England, United Kingdom, south of Bodmin and west of the border with Devon. At the 2021 Census in the United Kingdom, census it had a population of 20,900. History St Austell was a village centred ...
in
Cornwall Cornwall (; or ) is a Ceremonial counties of England, ceremonial county in South West England. It is also one of the Celtic nations and the homeland of the Cornish people. The county is bordered by the Atlantic Ocean to the north and west, ...
, England. A Victorian clay works has been preserved, and there is an exhibition building.


Background

The museum is set in of ground, and is based around two former china clay works. A large collection of objects, machinery, photographs and other archive material is preserved."About us"
Wheal Martyn clay works. Retrieved 12 May 2019.
It was established as a charity in 1975, with John Stengelhofen as its first director; in 2010 it was taken over by the charity South West Lakes Trust. Part of the site is a
Scheduled Monument In the United Kingdom, a scheduled monument is a nationally important archaeological site or historic building, given protection against unauthorised change. The various pieces of legislation that legally protect heritage assets from damage, visu ...
, listed on 11 April 1979. The grounds include a
Site of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain, or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle ...
, because of the geological features of the locality."Wheal Martyn SSSI"
Natural England Designated Sites. Retrieved 12 May 2019.


History

In 1790 Richard Martyn bought the Carthew Estate, and his son Elias started the Wheal Martyn china clay works there in the 1820s. By the 1840s there were five pits, and by 1869 Wheal Martyn was producing 2000 tons of clay a year. After Elias's death in 1872, his son Richard closed or leased works to other operators."Our history"
Wheal Martyn clay works. Retrieved 13 May 2019.
John Lovering took on the lease of Wheal Martyn in the 1880s, and made many modifications to the works. The pit at Wheal Martyn closed in 1931, but the pan kiln, for drying clay, was used for clay from nearby pits until 1969. The Gomm china clay works, which is also part of the site, was leased by the Martyn brothers from the Mount Edgcumbe Estate about 1878, and was worked until the 1920s. Wheal Martyn pit reopened in 1971 and is now worked by Imerys Minerals Ltd.


Clay works

In order to pump clay slurry from the pit, which is some distance from a source of water, a system of iron rods transmits power, by a
reciprocating motion Reciprocating motion, also called reciprocation, is a repetitive up-and-down or back-and-forth linear motion. It is found in a wide range of mechanisms, including reciprocating engines and pumps. The two opposite motions that comprise a single ...
, from a waterwheel of diameter , made at Charlestown Foundry in the 1880s. The waterwheel was in use until about 1940, and was restored in 1976.''Wheal Martyn''. Guide to the museum. Edited and reprinted February 2018. The slurry pump, used to pump slurry around the site, is powered by a waterwheel of diameter , built about 1902. There are areas that were used for thickening the clay: settling pits, with a sloping floor, where the clay settled for several days until it had about 12% solids; settling tanks, where the clay reached about 30% solids in two to three months; the pan kiln, or "dry", where clay was heated from below by gases from coal-fired furnaces, and dried in one to three days, depending on the distance from the fire end. Adjacent is the linhay, where about 1000 tons of clay could be stored; from here it was taken away to the customer.


Transport section

Examples are exhibited of transport used in the clay industry: a Pecketts railway locomotive of 1899, used at Lee Moor Pit in Devon; a 19th-century clay wagon (to be pulled by a team of three horses); a 1934 ERF lorry; and a First World War Peerless lorry.


Display areas

There are displays showing life in the china clay industry in the 19th century, including reconstructions of a clay worker's kitchen, and a
cooper Cooper, Cooper's, Coopers and similar may refer to: * Cooper (profession), a maker of wooden casks and other staved vessels Arts and entertainment * Cooper (producers), an alias of Dutch producers Klubbheads * "Cooper", a song by Roxette from ...
's workshop, where casks for transporting high-grade clay were made.


References

{{SSSIs Cornwall geological, state=collapsed Open-air museums in England Mining museums in Cornwall Sites of Special Scientific Interest in Cornwall Scheduled monuments in Cornwall