JEAN-BAPTISTE DE, a French writer, was born at Paris in 1675. His intercourse with La Fontaine was the means of inducing him to abandon the military profession which he had adopted, and to devote himself to literature. To obtain greater facility for study, he entered the Congregation of the Oratory. His French translation of Tasso's Gerusalemme Liberata, in 2 vols. 12mo, Paris, 1724, first introduced him to notice. The French Academy recognised his merit by admitting him soon afterwards among their number, and by electing him in 1742 their perpetual secretary. He died in 1760. The other works of Mirabaud are a translation of Ariosto's Orlando Furioso, in 4 vols. 12mo, Paris, 1758; Alphabet de la Fée Gracieuse 12mo, Paris, 1734; Opinions des Anciens sur les Juifs, 12mo, 1769; Le Monde, son Origine et son Antiquité, 8vo, Amsterdam, 1751; and Sentiments des Philosophes sur la Nature de l'Ame, inserted in the collection entitled Nouvelles Libertés de Penser, 12mo, Amsterdam, 1743. The atheistical work of Baron d'Holbach, entitled Système de la Nature, was published under Mirabaud's name.