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The year 1840 in science and technology

1 Astronomy

• John William Draper invents astronomical photography and photographs the Moon

2 Exploration

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

3 Geology

• Louis Agassiz publishes his Studies on Glaciers

4 Technology

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

5 Awards

• Copley Medal: Justus Liebig
• Wollaston MedalThe Wollaston Medal is a scientific award for geology, the highest award granted by the Geological Society of London. The medal is named after William Hyde Wollaston, and was first awarded in 1831. It was originally made of palladium, a metal discovered b: Andre Hubert Dumont

6 Births

• February 4February 4 is the 35th day of the year in the Gregorian Calendar. There are 330 days remaining, (331 in leap years). Events 1454 In the Thirteen Years' War, the Secret Council of the Prussian Confederacy sends a formal act of disobedience to the Grand Mas - Hiram Maxim (d. 1916See also Other events of 1916 List of years in science. 1915 in science 1916 in science 1917 in science. The year 1916 in science and technology included many significant events, some of which are listed below. Chemistry Gilbert Lewis and Irving Langmuir), inventorAn inventor is a person who creates new inventions, typically technical devices such as mechanical, electrical or computer-implemented devices or methods. Though some inventors may also be scientists, most base their work on the discoveries of other scien of the machine gunA machine gun is a fully-automatic firearm that is capable of firing bullets in rapid succession. Overview M2 machine gun surrounded by spent shell casings Unlike semi-automatic firearms, which require one trigger pull per bullet fired, a machine gun will.
• February 5February 5 is the 36th day of the year in the Gregorian Calendar. There are 329 days remaining (330 in leap years). Events 1576 Henry of Navarre converts to Roman Catholicism in order to ensure his right to the throne of France. 1631 Roger Williams emigra - 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.