CH. I. Of those Systems which make Virtue consist in Propriety . . . . . 237-260 CH. II. Of those Systems which make Virtue consist in Prudence . . . . . 260-265 CH. III. Of those Systems which make Virtue consist in Benevolence . . . . . 265-271 CH. IV. Of licentious Systems . . . 271-278 SEC. III. Of the different Systems which have been formed concerning the Principle of Approbation--Introduction . . . 279 CH. I. Of those Systems which deduce the Principle of Approbation from Self-love . . . 279-281 CH. II. Of those Systems which make Reason the Principle of Approbation . . . 282-284 CH. III. Of those Systems which make Sentiment the Principle of Approbation . . . 285-290 SEC. IV. Of the Manner in which different Authors have treated of the practical Rules of Morality 290-304 {8} ----- CONSIDERATIONS CONCERNING THE FORMATION OF LANGUAGES. 305-325 ----- ESSAYS ON PHILOSOPHICAL SUBJECTS. THE PRINCIPLES WHICH LEAD AND DIRECT PHILOSOPHICAL INQUIRIES, AS ILLUSTRATED BY THE HISTORY OF ASTRONOMY 325-326 SEC. I. Of the Effects of Unexpectedness, or of Surprise . . . . . 326-329 SEC. II. Of Wonder, or the Effects of Novelty . 329-337 SEC. III. Of the Origin of Philosophy . . 338-342 SEC. IV. The History of Astronomy . . . 342-384 ----- THE PRINCIPLES WHICH LEAD AND DIRECT PHILOSOPHICAL INQUIRIES, ILLUSTRATED BY THE HISTORY OF THE ANCIENT PHYSICS . . . . . 385-395 ----- THE PRINCIPLES WHICH LEAD AND DIRECT PHILOSOPHICAL INQUIRIES, ILLUSTRATED BY THE HISTORY OF ANCIENT LOGICS AND METAPHYSICS . . . . 395-405 ----- OF THE NATURE OF THAT IMITATION WHICH TAKES PLACE IN WHAT ARE CALLED THE IMITATIVE ARTS . . . 405 Part I., 405-415. Part II., 415-432. Part III . 432-434 ----- OF THE AFFINITY BETWEEN MUSIC, DANCING, AND POETRY 435-438 ----- OF THE EXTERNAL SENSES . . . . 438-439 Of the Sense of Touching, 439-444. Of the Sense of Tasting, 444-445. Of the Sense of Smelling, 445. Of the Sense of Hearing, 445-450. Of the Sense of Seeing . . . . . . 450-468 ----- OF THE AFFINITY BETWEEN CERTAIN ENGLISH AND ITALIAN VERSES . . . . . . 468-473 THE THEORY OF MORAL SENTIMENTS ----- _Part I.--Of the Propriety of Action._ SEC. I.--OF THE SENSE OF PROPRIETY. CHAP. I.--_Of Sympathy._