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The year 1840 in science and technology:

Contents 1 Astronomy 2 Exploration 3 Geology 4 Technology 5 Awards 6 Births 7 Deaths

[edit] Astronomy

• John William Draper invents astronomical photography and photographs the Moon

[edit] Exploration

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

[edit] Geology

• Louis Agassiz publishes his Studies on Glaciers

[edit] Technology

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

[edit] Awards

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

[edit] Births

• February 4 - Hiram Maxim (d. 1916), inventor of the machine gun.
• February 5 - John Boyd Dunlop (d. 1921), inventor.
• February 10 - Per Teodor Cleve (d. 1905), chemist.
• March 28 - Emin Pasha (d. 1892), explorer.
• August 4 - Richard von Krafft-Ebing (d. 1902), sexologist.

[edit] Deaths

• March 2 - Heinrich Wilhelm Matthäus Olbers (b. 1758), astronomer.
• March 23 - William Maclure (b. 1763), geologist.
• April 25 - Simeon Poisson (b. 1781), mathematician.