as a translation of Russell's Principles of Mathematics. In the same year, he published L'Algèbre de la logique, a classic introduction to Boolean algebra and the works of C.S. Peirce and Ernst Schröder. In 1907, Couturat helped found the constructed language Ido, an offshoot of Esperanto, and was Ido's principal advocate over the remainder of his life. By advocating a constructed international language, constructed along logical principles and with a vocabulary taken from existing European languages, Couturat was paralleling Peano's advocacy of Interlingua. By pushing Ido, Couturat walked in Leibniz's footsteps; Leibniz called for the creation a universal symbolic and conceptual language he named the characteristica universalis. Couturat, a confirmed pacifist, was killed when his car was hit by a car carrying orders for the mobilization of the French Army, in the first stage of World War I. He appears as a character in Joseph Skibell's 2010 novel, A Curable Romantic. Works 1896: De Platonicis mythis Thesim Facultati Litterarum Parisiensi proponebat Ludovicus Couturat, Scholae Normalae olim alumnus. Parisiis: Felix Alcan Bibliopola. 120 p. 1896: De l'Infini mathématique. Republished 1975, Georg Olms. 1901: La Logique de Leibniz. Republished 1961, Georg Olms. Donald Rutherford's English translation in progress. 1903: Opuscules et Fragments Inédits de Leibniz. Republished 1966, Georg Olms. 1903: (with Léopold Leau) Histoire de la langue universelle. Paris: Hachette. Republished 2001, Olms. 1905. Les Principes des Mathématiques: avec un appendice sur la philosophie des mathématiques de Kant. Republished 1965, Georg Olms. 1905: L'Algèbre de la logique. 1914: P. E. B. Jourdain translator, The Algebra of Logic, Open Court, from Project Gutenberg. 1906: ¨Pour la langue internationale, Päris 1907: (with Léopold Leau) Les nouvelles langues internationales. Paris: Hachette, republished 2001, Olms. 1910: Étude sur la dérivation dans la langue internationale. Paris: Delagrave. 100 p. 1910: (with Otto Jespersen, R. Lorenz, Wilhelm Ostwald and L.Pfaundler) International Language and Science: Considerations on the Introduction of an International Language into Science, Constable and Company Limited, London. 1915: (with Louis de Beaufront) Dictionnari Français-Ido. Paris: Chaix, 586 p. References Sources Proceedings of a conference. Bibliography contains 27 items by Couturat. External links Auteur Couturat on French Wikisource 1868 births 1914 deaths People from Ris-Orangis Linguists from France French logicians French mathematicians French philosophers École Normale Supérieure alumni Idists Constructed language creators Logicians Road incident deaths in France French male writers Philosophers of language