John Canton
John Canton (born July 31, 1718 in Stroud , Gloucestershire , † March 22, 1772 in London ) was an English physicist .
Life
Canton became a teacher in 1738 and taught from 1742 at a private school in London. Among other things, he invented an electroscope and determined the electrical charge collected in Leiden bottles . In 1750 he succeeded in producing artificial permanent magnets without having to use naturally occurring magnetic materials.
In 1762 he proved that water is actually compressible . In his work Electrical experiments: with an attempt to account for their several phenomena , published in 1753, he and Benjamin Franklin reported that the electrical charge of some clouds is positive and others negative. He became famous with the Canton luminous stones , also Cantons Phosphorus , a calcium - phosphorus compound, which afterglow in the dark after being previously irradiated by sunlight.
Awards
In 1751 he was awarded the Copley Medal .
Other works
- Attempt to account for the regular diurnal variation of the horizontal magnetic needle etc. London (1759)
literature
- Canton, John . In: Encyclopædia Britannica . 11th edition. tape 5 : Calhoun - Chatelaine . London 1910, p. 218 (English, full text [ Wikisource ]).
Web links
- Biography with picture
- Entry to Canton; John (1718-1772); Natural Philosopher in the Archives of the Royal Society , London
Individual evidence
- ↑ Probably not calcium sulfide (CaS)
- ^ Leopold Gmelin: Handbook of Chemistry . tape 1 . Karl Winter, 1843 ( Google Books ).
| personal data | |
|---|---|
| SURNAME | Canton, John |
| BRIEF DESCRIPTION | English physicist |
| DATE OF BIRTH | July 31, 1718 |
| PLACE OF BIRTH | Stroud , Gloucestershire |
| DATE OF DEATH | March 22, 1772 |
| Place of death | London |