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Deaths on March 25

1818Mar, 25

Caspar Wessel

Caspar Wessel, Norwegian-Danish mathematician and cartographer (b. 1745)
Caspar Wessel (8 June 1745, Vestby – 25 March 1818, Copenhagen) was a Danish–Norwegian mathematician and cartographer. In 1799, Wessel was the first person to describe the geometrical interpretation of complex numbers as points in the complex plane and vectors.

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Events on 1818

  • 12Feb

    Chilean Declaration of Independence

    Bernardo O'Higgins formally approves the Chilean Declaration of Independence near Concepción, Chile.
  • 4Apr

    Flag of the United States

    The United States Congress adopts the flag of the United States with 13 red and white stripes and one star for each state (then 20).
  • 16Apr

    Rush-Bagot Treaty

    The United States Senate ratifies the Rush-Bagot Treaty, establishing the border with Canada.
  • 20Apr

    Trial by battle

    The case of Ashford v Thornton ends, with Abraham Thornton allowed to go free rather than face a retrial for murder, after his demand for trial by battle is upheld.