Deaths on March 25

Caspar Wessel

Died on March 25, 1818

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.

References

Caspar Wessel

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Events on 1818

12 Feb

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

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).
16 Apr

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

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.

Deaths on March 25

Caspar Wessel

Died on March 25, 1818

References

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Events on 1818

Chilean Declaration of Independence

Flag of the United States

Rush-Bagot Treaty

Trial by battle