You can help expand this article with text translated from the corresponding article in French. (January 2012) Click [show] for important translation instructions.
View a machine-translated version of the French article.
Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia.
Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article.
You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing French Wikipedia article at [[:fr:Louis-Léon de Brancas]]; see its history for attribution.
You may also add the template {{Translated|fr|Louis-Léon de Brancas}} to the talk page.
Louis-Léon-Félicité de Brancas, 3rd duc de Lauraguais seated in his study, with chemical apparatus.
Louis-Léon de Brancas (3 July 1733 – 9 October 1824), 3rd duc de Lauraguais, 6th duc de Villars, was a French general and author, and a member of the French Academy of Sciences.
He was the son of Louis de Brancas-Villars and Adelaide-Genevieve d'O, Marquise de Franconville.[1] He married Elisabeth-Pauline de Gand, Princess d'Isenghien, in 1755.
