| PLATE |
| I. | The Planet Saturn | [Frontispiece] |
| II. | A Typical Sun-spot | To face page | [9] |
| A. | The Sun | " | " | [44] |
| III. | Spots and Faculæ on the Sun | " | " | [37] |
| IV. | Solar Prominences or Flames | " | " | [57] |
| V. | The Solar Corona | " | " | [62] |
| VI. | Chart of the Moon's Surface | " | " | [81] |
| B. | Portion of the Moon | " | " | [88] |
| VII. | The Lunar Crater Triesnecker | " | " | [93] |
| VIII. | A Normal Lunar Crater | " | " | [97] |
| IX. | The Lunar Crater Plato | " | " | [102] |
| X. | The Lunar Crater Tycho | " | " | [106] |
| XI. | The Planet Jupiter | " | " | [254] |
| XII. | Coggia's Comet | " | " | [340] |
| C. | Comet A., 1892, 1 Swift | " | " | [358] |
| XIII. | Spectra of the Sun and of three Stars | " | " | [47] |
| D. | The Milky Way, near Messier II. | " | " | [462] |
| XIV. | The Great Nebula in Orion | " | " | [466] |
| XV. | The Great Nebula in Andromeda | " | " | [468] |
| E. | Nebulæ in the Pleiades | " | " | [472] |
| F. | ω Centauri | " | " | [474] |
| XVI. | Nebulæ observed with Lord Rosse's Telescope | " | " | [476] |
| XVII. | The Comet of 1882 | " | " | [357] |
| XVIII. | Schiaparelli's Map of Mars | " | " | [221] |