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Louis IV, French king

(Encyclopedia)Louis IV or Louis d'Outremer lwē do͞otrəmĕrˈ [key] [Fr.,=Louis from overseas], 921–54, French king (936–54), son of King Charles III (Charles the Simple). He spent his youth as an exile in En...

Langevin, Sir Hector Louis

(Encyclopedia)Langevin, Sir Hector Louis ĕktôrˈ lwē läNzhəvăNˈ [key], 1826–1906, Canadian legislator, b. Quebec. A lawyer, he served in the Legislative Assembly (1857–67) and its successor, the House of...

Lacaille, Nicolas Louis de

(Encyclopedia)Lacaille, Nicolas Louis de nēkôläˈ lwē də läkäˈyə [key], 1713–62, French astronomer. As a result of his success in making meridional measurements in France under the patronage of the duke ...

LaFontaine, Sir Louis Hippolyte

(Encyclopedia)LaFontaine, Sir Louis Hippolyte ləwēˈ ēpôlētˈ läfôNtĕnˈ [key], 1807–64, Canadian political leader, b. Lower Canada (now Quebec). A lawyer, he entered (1830) the Legislative Assembly of Lo...

Lagrange, Joseph Louis, Comte

(Encyclopedia)Lagrange, Joseph Louis, Comte zhôzĕfˈ lwē kôNt lägräNzhˈ [key], 1736–1813, French mathematician and astronomer, b. Turin, of French and Italian descent. Before the age of 20 he was professor...

Bougainville, Louis Antoine de

(Encyclopedia)Bougainville, Louis Antoine de lwē äNtwänˈ də bo͞ogăNvēlˈ [key], 1729–1811, French navigator. He accompanied Montcalm to Canada as aide-de-camp, and he later (c.1764) established a colony o...

Bourdonnais, Louis de la

(Encyclopedia)Bourdonnais, Louis de la (Louis-Charles Mahé de la Bourdonnais), 1795–1840, French chess player, b. La Réunion. A pupil of Alexandre Deschappelles, he defeated his mentor in 1821 and from then unt...

Cauchy, Augustin Louis, Baron

(Encyclopedia)Cauchy, Augustin Louis, Baron ōgüstăNˈ lwē bärôNˈ kōshēˈ [key], 1789–1857, French mathematician. He was professor simultaneously (1816–30) at the École polytechnique, the Sorbonne, and...

Bignon, Louis Pierre Édouard

(Encyclopedia)Bignon, Louis Pierre Édouard lwē pyĕr ādwärˈ bēnyôNˈ [key], 1771–1841, French diplomat and historian. He held diplomatic posts under Napoleon, was acting minister of foreign affairs during ...

Berthollet, Claude Louis, Comte

(Encyclopedia)Berthollet, Claude Louis, Comte klōd lwē, kôNt bĕrtōlāˈ [key], 1748–1822, French chemist. His contributions to chemistry include the analysis of ammonia and prussic acid and the discovery of ...