| Chapter | | Page | | I. | —Introduction | 1 | | II. | —The Problem Stated | 21 | | III. | —The Fire-mist | 39 | | IV. | —NebulÆ—Apparent and Real | 52 | | V. | —The Heat of the Sun | 75 | | VI. | —How the Sun’s Heat is Maintained | 95 | | VII. | —The History of the Sun | 112 | | VIII. | —The Earth’s Beginning | 122 | | IX. | —Earthquakes and Volcanoes | 158 | | X. | —Spiral and Planetary NebulÆ | 191 | | XI. | —The Unerring Guide | 207 | | XII. | —The Evolution of the Solar System | 246 | | XIII. | —The Unity of Material in the Heavens and the Earth | 261 | | XIV. | —The First Concord | 294 | | XV. | —The Second Concord | 308 | | XVI. | —The Third Concord | 324 | | XVII. | —Objections to the Nebular Theory | 337 | | XVIII. | —The Beginning of the Nebula | 348 | | XIX. | —Concluding Chapter | 361 | | | Appendices | 369 | | | Index | 382 | |
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