PLATO: _Dialogues_, especially _Protagoras_ and _Theaetetus_. Translation by Jowett. (The actual genesis of special problems.) * * * * * KUELPE, OSWALD: _Introduction to Philosophy._ Translation by Pillsbury and Titchener. (Full and accurate account of the traditional terms and doctrines of philosophy.) HIBBEN, J. G.: _Problems of Philosophy._ (Brief and elementary.) SIDGWICK, HENRY: _Philosophy, its Scope and Relations._ PAULSEN, FRIEDRICH: _Introduction to Philosophy._ Translation by Thilly. BALDWIN, J. M.: _Dictionary of Philosophy._ (Full, and convenient for reference.) FERRIER, J. F.: _Lectures on Greek Philosophy._ (Interpretation of the beginning and early development of philosophy.) BURNET, J.: _Early Greek Philosophy._ Translation of the sources. FAIRBANKS, A.: _The First Philosophers of Greece._ GOMPERZ, TH.: _Greek Thinkers_, Vol. I. Translation by Magnus. (On the first development of philosophical problems.) PALMER, G. H.: _The Field of Ethics._ (On the relations of the ethical problem.) PUFFER, ETHEL: _The Psychology of Beauty._ (On the relations of the æsthetical problem.) CHAPTER VIII, NATURALISM.[436:A] LUCRETIUS: _On the Nature of Things._ Translation by Munro. (Early materialism.) HOBBES: _Metaphysical System._ Edited by Calkins. _Leviathan_, Part I. (Modern materialism.) * * * * * BUECHNER, LOUIS: _Force and Matter._ Translation by Collingwood. (Nineteenth century materialism.) JANET, PAUL: _Materialism of the Present Day._ Translation by Masson. LANGE, F. A.: _History of Materialism._ Translation by Thomas. HAECKEL, ERNST: _The Riddle of the Universe._ Translation by McCabe. ("Monism of Energy.") CLIFFORD, W. K.: _Lectures and Essays: The Ethics of Belief; Cosmic Emotion; Body and Mind._ (Positivism.) HUXLEY, T. H.: _Evolution and Ethics; Prolegomena._ (Distinguishes between the moral and natural.) _Science and Hebrew Tradition_; _Science and Christian Tradition_. (Controversies of the naturalist with Gladstone and Duke of Argyle.) SPENCER, HERBERT: _First Principles._ (The systematic evolutionary philosophy.) _Principles of Ethics._ (Ethics of naturalism.) _The Nature and Reality of Religion._ (Controversy with Frederick Harrison.) BALFOUR, A. J.: _Foundations of Belief_, Part I. (On the religious, moral, and æsthetic consequences of naturalism.) PATER, WALTER: _Marius the Epicurean._ (Refined hedonism.) ROMANES, G. J.: _Thoughts on Religion._ (Approached from stand-point of science.) BENTHAM, J.: _Introduction to the Principles of Morals and Legislation._ (Utilitarian.) STEPHEN, L.: _Science of Ethics._ (Evolutionary and social.) CHAPTER IX, SUBJECTIVISM. PLATO: _Theaetetus._ Translation by Jowett. (Exposition and criticism of Protagoras.) BERKELEY: _Three Dialogues between Hylas and Philonous_; _Principles of Human Knowledge_. HUME: _An Enquiry Concerning Human Understanding._