This article is about the year 1852.
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1852 (MDCCCLII) was a leap year starting on Thursday (dominical letter DC) of the Gregorian calendar and a leap year starting on Tuesday (dominical letter FE) of the Julian calendar, the 1852nd year of the Common Era (CE) and Anno Domini (AD) designations, the 852nd year of the 2nd millennium, the 52nd year of the 19th century, and the 3rd year of the 1850s decade. Note that the Julian day for 1852 is 12 calendar days difference, which continued to be used from 1582 until the complete conversion of the Gregorian calendar was entirely done in 1929.
- October 7 — After learning that U.S. President Fillmore has sent Commodore Matthew C. Perry, to open trade with Japan, Nicholas I of Russia sent Rear Admiral Yevfimy Putyatin to lead the Pallada on a similar mission. Putyatin arrived on August 21, 1853, one month after Perry.
- October 16 — After nearly five years imprisonment in France, former Algerian Emir Abdelkader El Djezairi was released by orders of then-president Louis-Napoléon Bonaparte.
- October 23 — The conjecture of the four color theorem was first proposed, as student Francis Guthrie of University College London presented the question of proving, mathematically, that no more than four colors are needed to give separate colors to bordering shapes on a map. The theorem was not proven for almost 123 years, until 1976.
- October 31 — General Joaquin Solares of Guatemala led an invasion of neighboring Honduras, beginning a war that lasted until February 13, 1856.
- November 2 – U.S. presidential election, 1852: Democrat Franklin Pierce of New Hampshire defeated Whig Winfield Scott of Virginia.
- November 4 – Camillo Benso, Count of Cavour becomes the Piedmontese prime minister.
- November 11 – The new Palace of Westminster was opened in London.
- November 21–22 – The New French Empire was confirmed by plebiscite: 7,824,000 for, 253,000 against.
- November 23 – The first roadside pillar boxes in the British Isles were brought into public use in Saint Helier on Jersey in the Channel Islands at the suggestion of English novelist Anthony Trollope, at this time an official of the British General Post Office.
- December – The Western Railroad was chartered to build a railroad from Fayetteville, North Carolina to the coal fields of Egypt, North Carolina.
- December 2 – Napoleon III became Emperor of the French.
- December 4 – The French captured Laghouat.
- December 23 – Taiping Rebellion: The Taiping army took Hanyang and begins the siege of Wuchang.
- December 29 – Taiping Rebellion: The Taiping army took Hankou.
- January 8 – James Milton Carroll, Baptist pastor, leader, historian, and author (d. 1931)
- January 11 – Constantin Fehrenbach, Chancellor of Germany (d. 1926)
- January 18 – Augustin Boué de Lapeyrère, French admiral (d. 1924)
- January 20 – José Guadalupe Posada,Mexican political printmaker and engraver (d.1913)
- February 16 – Charles Taze Russell (Pastor Russell), prominent Protestant reformer and evangelist (d. 1916)
- February 26 – John Harvey Kellogg, American doctor (d. 1943)
- February 29 – Frederic, one of the protagonists in Gilbert and Sullivan's operetta The Pirates of Penzance (date of death unknown)
- March 1 – Théophile Delcassé, French statesman (d. 1923)
- April 1 – Edwin Austin Abbey, American painter (d. 1911)
- April 13 – F. W. Woolworth, American merchant and businessman (d. 1919)
- April 22 – William IV, Grand Duke of Luxembourg (d. 1912)
- May 1 – Santiago Ramón y Cajal, Spanish histologist, recipient of the Nobel Prize in Physiology or Medicine (d. 1934)
- May 4 – Alice Pleasance Liddell, inspiration for the children's classic Alice's Adventures in Wonderland by Lewis Carroll (d. 1934)
- May 31 – Julius Richard Petri, German bacteriologist (d. 1921)
- June 13 – Anna Whitlock, Swedish women's right activist (d. 1930)
- June 25 – Friedrich Loeffler, German bacteriologist (d. 1915)
- June 25 – Antoni Gaudí, Spanish modernist architect (d. 1926)
- June 30 – Karl Petrovich Jessen, Russian admiral (d. 1918)
- July 12 – Hipólito Yrigoyen, President of Argentina (d. 1933)
- July 31 – Charles Lanrezac, French general (d. 1925)
- August 23 – Clímaco Calderón, President of Colombia (d. 1913)
- August 30 – Jacobus Henricus van 't Hoff, Dutch chemist, Nobel Prize laureate (d. 1911)
- September 10 – Hans Niels Andersen, Danish businessman, founder of the East Asiatic Company (d. 1937)
- September 12 – Herbert Henry Asquith, Prime Minister of the United Kingdom (d. 1928)
- September 15 – Edward Bouchet, American physicist (d. 1918)
- September 28
- September 30 – Charles Villiers Stanford, Irish composer, resident in England (d. 1924)
- October 2 – William Ramsay, Scottish chemist, Nobel Prize laureate (d. 1916)
- October 9 – Hermann Emil Fischer, German chemist, Nobel Prize laureate (d. 1919)
- October 17 – George Egerton, British admiral (d. 1940)
- October 25 – Byron Andrews, journalist, statesman, author, businessman.
- November 1 – Eugene W. Chafin, American politician (d. 1920)
- November 3 – Prince Mutsuhito of Japan, the future Emperor Meiji (d. 1912)
- November 11 – Franz Conrad von Hötzendorf, Austro-Hungarian field marshal (d. 1925)
- November 22 – Paul-Henri-Benjamin d'Estournelles de Constant, French diplomat, recipient of the Nobel Peace Prize (d. 1924)
- November 26 – Yamamoto Gonnohyōe, the 16th and 22nd Prime Minister of Japan, an admiral in the Imperial Japanese Navy
- December 15
- December 19 – Albert Abraham Michelson, German-born physicist, Nobel Prize laureate (d. 1931)
- December 21 – George Callaghan, British admiral (d. 1920)
- July 20 – José Antonio Estudillo, early California settler (b. 1805)
- July 22 – Auguste de Marmont, French marshal (b. 1774)
- September 4 – William MacGillivray, Scottish naturalist and ornithologist (b. 1796)
- September 14
- September 20 – Philander Chase, American founder of Kenyon College (b. 1775)
- October 7 – Sir Edward Troubridge, 2nd Baronet, British admiral (b. ca. 1787)
- October 13 – John Lloyd Stephens, American traveler, diplomat and Mayanist archaeologist (b. 1805)
- October 15 – Friedrich Ludwig Jahn, German gymnastics educator (b. 1778)
- October 24 – Daniel Webster, American statesman (b. 1782)
- October 25 – John C. Clark, American politician (b. 1793)
- October 26 – Vincenzo Gioberti, Italian philosopher (b. 1801)
- November 2 – Pyotr Kotlyarevsky, Russian military hero (b. 1782)
- November 17 – Adam Karl August von Eschenmayer, German philosopher (b. 1768)
- November 27 – Augusta Ada King (née Byron), Countess of Lovelace, early English computer pioneer (b. 1815)
- November 29 – Nicolae Bălcescu, Wallachian revolutionary (b. 1819)
- November 30 – Junius Brutus Booth, English-born actor (b. 1796)
- December 16 – Andries Hendrik Potgieter, Voortrekker leader (b. 1792)
- ↑ King, William T. (1896). History of the American Steam Fire-Engine.
- ↑ Kimura, Hiroshi (2008). The Kurillian Knot: A History of Japanese-Russian Border Negotiations. California: Stanford University Press. p. 23.
- ↑ Chateaux of the Loire. Casa Editrice Bonechi. 2007. p. 10.
- ↑ MacKenzie, Donald (2004). Mechanizing Proof: Computing, Risk, and Trust. Cambridge, Mass.: MIT Press. p. 103.
- ↑ Scheina, Robert L. (2003). Latin America’s Wars. I. Potomac Books, Inc. p. 1849.
- ↑ Farrugia, Jean Young (1969). The Letter Box: A History of Post Office Pillar and Wall boxes. Fontwell: Centaur Press. p. 27. ISBN 0-90000014-7.
- ↑ CommunicationSolutions/ISI, "Railroad — Western Railroad Company", North Carolina Business History, 2006, accessed 1 Feb 2010.