1781 in science

List of years in science (table)
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The year 1781 in science and technology involved some significant events.

Astronomy

• March 13 – William Herschel observes Uranus (although initially recording it as a comet).^[1]
• March 20 – Pierre Méchain discovers dwarf galaxy NGC 5195.
• Charles Messier's final catalogue of Messier objects is published.
• Christian Mayer's catalogue of binary stars is published.^[2]

Biology

• Felix Fontana uses a microscope to describe the axon of a brain cell.
• John Latham begins publication of A General Synopsis of Birds.

Chemistry

• Archibald Cochrane, 9th Earl of Dundonald is granted a British patent for the manufacture of coal tar.^[3][4]
• Carl Wilhelm Scheele ascertains that a new acid can be made from tungstenite, leading to the discovery of tungsten in 1783.^[5]
• Autumn – Peter Jacob Hjelm isolates molybdenum.^[5][6]

Awards

• Copley Medal: William Herschel

Births

• January 30 – Adelbert von Chamisso, poet and botanist (died 1838)
• February 17 – Rene Theophile Hyacinthe Laennec, French physician, inventor of the stethoscope (died 1826)
• May 29 – John Walker, English chemist (died 1859)
• June 9 – George Stephenson, English locomotive engineer (died 1848)
• June 21 – Siméon Poisson, mathematician (died 1840)
• July 6 – Thomas Stamford Raffles, founder of the Zoological Society of London (died 1826)
• September 14 – James Walker, Scottish civil engineer (died 1862)
• October 5 – Bernhard Bolzano, mathematician (died 1848)
• December 11 – David Brewster, Scottish physicist (died 1868)

Deaths

• May 27 – Giovanni Battista Beccaria, Italian physicist (born 1716)

References

1. "Account of a Comet, By Mr. Herschel, F.R.S.; Communicated by Dr. Watson, Jun. of Bath, F.R.S" (PDF). Philosophical Transactions of the Royal Society (London) 71: 492–501. 1781. Bibcode:1781RSPT...71..492H. doi:10.1098/rstl.1781.0056. Retrieved 2012-01-05.
2. "Verzeichniss aller bisher entdeckten Doppeltsterne" In Johann Elert Bode's Astronomisches Jahrbuch for 1784, pp. 183-6.
3. Burke, James (1978). Connections. London: Macmillan. p. 196. ISBN 0-333-24827-9.
4. "Coal Tar Before the Invention of Town's Gas". Retrieved 2011-12-31.
5. Emsley, John (2001). Nature's Building Blocks: an A–Z guide to the elements. Oxford University Press. ISBN 978-0-19-850341-5.
6. Hjelm, P. J. (1788). "Versuche mit Molybdäna, und Reduction der selben Erde". Der Königl. Schwedischen Akademie der Wissenschaften neue Abhandlungen aus der Naturlehre, Haushaltungskunst und Mechanik (Leipzig) 49: 268.