1777 in science

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The year 1777 in science and technology involved some significant events.

Exploration

• March – Third voyage of James Cook: English explorer Captain Cook discovers Mangaia and Atiu in the Cook Islands.

Mathematics

• Leonhard Euler introduces the symbol i to represent the square root of −1.

Technology

• probable date – Thomas Arnold of London produces the first watch ("Arnold 36") to be called a chronometer.

Awards

• Copley Medal: John Mudge

Births

• February 12 – Bernard Courtois, chemist (died 1838)
• April 30 – Carl Friedrich Gauss, mathematician (died 1855)
• May 4 – Louis Jacques Thénard, chemist (died 1857)
• August 14 – Hans Christian Ørsted, physicist (died 1851)

Deaths

• September 22 – John Bartram, naturalist and explorer considered the "father of American botany" (born 1699)
• December 7 – Albrecht von Haller, Swiss anatomist and physiologist (born 1708)