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Hace 21 horas · 1st century AD: The aeolipile, a simple steam turbine is recorded by Hero of Alexandria. [263] 1st century AD: The first use of respiratory protective equipment is documented by Pliny the Elder ( c. 23 AD –79) using animal bladder skins to protect workers in Roman mines from red lead oxide dust.
Hace 1 día · The scattered insurgents formed guerrilla bands. In 1820, the Spanish royal army brigadier Agustín de Iturbide changed sides and proposed independence, issuing the Plan of Iguala. Iturbide persuaded insurgent leader Vicente Guerrero to join this new push for independence.
Hace 2 días · 1820: Discovery of Antarctica. 1820: Liberia founded by the American Colonization Society for freed American slaves. 1820: Dissolution of the Maratha Empire. 1821–1823: First Mexican Empire, as Mexico's first post-independence government, ruled by Emperor Agustín I of Mexico.
5 de abr. de 2024 · Antonio López de Santa Anna (born February 21, 1794, Jalapa, Mexico—died June 21, 1876, Mexico City) was a Mexican army officer and statesman who was the storm centre of Mexico’s politics during such events as the Texas Revolution (1835–36) and the Mexican-American War (1846–48).
15 de abr. de 2024 · En abril de 1820, mientras se preparaba para una conferencia nocturna, Ørsted notó cómo una aguja de la brújula se desviaba del norte magnético cuando se encendía y apagaba la corriente eléctrica de una batería.
17 de abr. de 2024 · Charles-Ferdinand de Bourbon, duke de Berry (born Jan. 24, 1778, Versailles, Fr.—died Feb. 14, 1820, Paris) was a French prince whose murder by the fanatic Louvel marked a turning point in the history of the Restoration monarchy (1814–30).
22 de abr. de 2024 · Minnesota: Fort Snelling, Minnesota, AD 1820 In Minnesota, there are preserved burial mounds dating as far back as 3000 BC in Mille Lacs Kathio State Park, but the Round Tower at Fort Snelling...
