Compositions   1813: L'Italiana in Algeri 1813: Tancredi 1815: Il Barbieri di Siviglia 1817: La Cenerentola 1823: Semiramide 1829: Guglielmo Tell 1841: Stabat Mater	Science 1796: Jenner: Vaccination         1822: Faraday: Electric motor   1839: Daguerre: Early photography 1859: Darwin: Origin of Species