October 25, 2021


April 5 - The eruption of Tambora volcano, which caused about 70,000 deaths in Indonesia and the "Year without Summer" in Europe and North America. June 18 - Napoleon loses the Battle of Waterloo. August 8 - Napoleon is exiled to the island of St. Helena. June 8 - The Congress of Vienna concludes.


David Brewster discovered the phenomenon of complete polarization of light when falling on the interface at a certain angle.


January 11 - John Alexander MacDonald, First Prime Minister of Canada (1867-1873, 1878-1891). January 21 - Horace Wells, an American dentist, is the first to use medical anesthesia (1845). February 16 - Gulak-Artemovsky Semyon Stepanovych, Ukrainian opera singer-baritone, composer, dramatic artist, playwright. March 4 - Mykhailo Verbytsky, composer, public figure, author of the music of the anthem of Ukraine "Ukraine is not dead yet" († 1870). April 1 - Otto Eduard Leopold von Bismarck, the first Reich Chancellor of Germany (1866-1890) during the Second Reich.


February 24 - Robert Fulton, American engineer and inventor, creator of the first steamer. December 7 - Michel Ney, French Marshal of Napoleon's time.

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