1748 "L'homme plus que machine." London (Leyden). * "Man More than a Machine," translated from the French of Elie Luzac, and printed with the translation of "Man a Machine" for G. Smith, 1750. RENÉ DESCARTES. 1637 "Essais philosophiques," including "Discours de la méthode." * "The Discourse on Method," translated by John Veitch. Open Court Publishing Co., 1903. 1641 "Meditationes de prima philosophia." 1644 "Principia philosophiae." * "The Meditations and Selections from the Principles of Philosophy," translated by John Veitch. Open Court Publishing Co., 1905. 1650 "Les passions de l'âme." * "OEuvres de Descartes," Vol. IV. Edited by Victor Cousin, Paris, 1824. JOHN TOLAND. 1704 * "Letters to Serena." London. Printed for Bernard Lintot. THOMAS HOBBES. 1650 "Human Nature or the Fundamental Elements of Policie." London. 1651 "Leviathan; Or the Matter, Form, and Power of a Commonwealth, Ecclesiastical & Civil." London. 1655 "Elementorum Philosophiae Sectio Prima: De Corpore." London. * English Works edited by Sir William Molesworth, 1839-45. Volume III. Leviathan. Volume IV. Human Nature. JOHN LOCKE. 1690 "An Essay Concerning Human Understanding." London. * Edition of Books II and IV (with omissions) preceded by the English version of Le Clerc's "Eloge historique de feu Mr. Locke," ed. M. W. Calkins. Open Court Publishing Co., 1905. ETIENNE BONNOT DE CONDILLAC. 1754 "Traité des sensations." Paris and London. 1755 "Traité des animaux." Paris and London. * "OEuvres complètes," 23 vols. Edited by Guillaume Arnoux and Mousnier. Paris, 1798. Vol. III. "Traité des sensations." "Traité des animaux." BARON P. H. D. VON HOLBACH. 1770 "Système de la nature," par M. Mirabaud [really Von Holbach]. * Nouvelle edition avec des notes et des corrections par Diderot. Paris, 1821. C. A. HELVETIUS.