1840 in science
From Wikipedia, the free encyclopedia.

The year 1840 CE in science and technology

See also: 1839 in science, other events of 1840, 1841 in science and the list of years in science.

Astronomy

• John William Draper invents astronomical photography and photographs the Moon

Exploration

• Adelie land first visited by Jules Dumont d'Urville and claimed for France

Geology

• Louis Agassiz publishes his Studies on Glaciers

Technology

• William Fox Talbot invented the positive / negative process of photography used in all modern photography. He refers to this as photogenic drawing

Awards

• Copley Medal: Justus Liebig
• Wollaston Medal: Andre Hubert Dumont

Births

• February 4 - Hiram Maxim, inventor of the machine gun († 1916)
• February 5 - John Boyd Dunlop, inventor († 1921)
• February 10 - Per Teodor Cleve, chemist († 1905)
• March 28 - Emin Pasha, explorer († 1892)

Deaths

• April 25 - Simeon Poisson, mathematician (born 1781)
• Heinrich Wilhelm Olbers, astronomer (born 1758)

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