  ON THE FOURFOLD ROOT OF THE PRINCIPLE
OF SUFFICIENT REASON. | CHAP. | | PAGE | | Translator's Preface | v | | Author's Preface to the Second Edition | xvii | | Editor's Preface to the Third Edition | xx | | Editor's Preface to the Fourth Edition | xxviii | | I. | Introduction | 1 | | II. | General Survey of the most important views hitherto held concerning the Principle of Sufficient Reason | 6 | | III. | Insufficiency of the Old and outlines of a New Demonstration | 28 | | IV. | On the First Class of Objects for the Subject, and that form of the Principle of Sufficient Reason which predominates in it | 31 | | V. | On the Second Class of Objects for the Subject and that form of the Principle of Sufficient Reason which predominates in it | 114 | | VI. | On the Third Class of Objects for the Subject and that form of the Principle of Sufficient Reason which predominates in it | 153 | | VII. | On the Fourth Class of Objects for the Subject, and that form of the Principle of Sufficient Reason which predominates in it | 165 | | VIII. | General observations and results | 177 | ON THE WILL IN NATURE. | Preface to the Second Edition | 193 | | Editor's Preface to the Third Edition | 213 | | Editor's Preface to the Fourth Edition | 214 | | Introduction | 215 | | Physiology and Pathology | 224 | | Comparative Anatomy | 252 | | Physiology of Plants | 281 | | Physical Astronomy | 305 | | Linguistic | 322 | | Animal Magnetism and Magic | 326 | | Sinology | 359 | | Reference to Ethics | 372 | | Conclusion | 378 |
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