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John Canton
John Canton from NPG.jpg
John Canton
Born(1718-07-31)31 July 1718
Died22 March 1772(1772-03-22) (aged 53)
Known forElectrostatic induction
Artificial magnets
Compressibility of liquids
Canton’s phosphorus
AwardsCopley Medal (1751), (1764)
Scientific career

John Canton FRS (31 July 1718 – 22 March 1772) was a British physicist. He was born in Middle Street Stroud, Gloucestershire, the son of a weaver John Canton (b. 1687) and Esther (née Davis). At the age of nineteen, under the auspices of Dr Henry Miles, he was articled for five years as clerk to Samuel Watkins, the master of a school in Spital Square, London, with whom at the end of that time he entered into partnership.

Plaque to John Canton on the wall of the Old Town Hall in the Shambles, Stroud, Gloucestershire
Plaque to John Canton on the wall of the Old Town Hall in the Shambles, Stroud, Gloucestershire

In 1750 he read a paper before the Royal Society on a method of making artificial magnets, which procured him election as a fellow of the society. In 1751 he was a recipient of the Copley Medal "On account of his communicating to the Society, and exhibiting before them, his curious method of making Artificial Magnets without the use of Natural ones." He was the first in England to verify Benjamin Franklin's hypothesis of the identity of lightning and electricity, and he made several important electrical discoveries.

In 1762 and 1764 he published experiments in refutation of the decision of the Florentine Academy, at that time generally accepted, that water is incompressible.[2][3] In 1768 he described the preparation, by calcining oyster-shell with sulphur, of the phosphorescent material known as Canton's phosphorus.[4] His investigations were carried on without any intermission of his work as a schoolmaster. He died in London aged 53 of dropsy.

He was the recipient of letters from Thomas Bayes, which were then published by the Royal Society.


  1. ^
  2. ^ Canton, John (1761–1762). "Experiments to Prove That Water is Not Incompressible". Philosophical Transactions. 52: 640–643. doi:10.1098/rstl.1761.0105. JSTOR 105681.
  3. ^ Canton, John (1764). "Experiments and Observations on the Compressibility of Water and Some Other Fluids". Philosophical Transactions. 54: 261–262. doi:10.1098/rstl.1764.0045. JSTOR 105560.
  4. ^ Canton, John (1768). "An Easy Method of Making a Phosphorus, That Will Imbibe and Emit Light, like the Bolognian Stone". Philosophical Transactions. 58: 337–344. doi:10.1098/rstl.1768.0045. JSTOR 105793.

External links

 This article incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). "Canton, John". Encyclopædia Britannica (11th ed.). Cambridge University Press.

This page was last edited on 23 March 2018, at 10:50
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