| FIG. | PAGE |
| 1. | [Principle of Galilean Telescope] | [3] |
| 2. | [Principle of Common Refractor] | [3] |
| 3. | [Dorpat Refractor] | [7] |
| 4. | [Thirty-inch Refractor, Pulkowa Observatory] | [10] |
| 5. | [Principle of Newtonian Reflector] | [11] |
| 6. | [Lord Rosse's Telescope] | [11] |
| 7. | [Herschel's 4-foot Reflector] | [13] |
| 8. | [Star—Correct and Incorrect Adjustment] | [20] |
| 9. | [Small Telescope on Pillar and Claw Stand] | [25] |
| 10. | [Telescope on Tripod, with Finder and Slow Motions] | [28] |
| 11. | [Equatorial Mounting for Small Telescope] | [28] |
| 12. | [Eight-inch Refractor on Equatorial Mounting] | [32] |
| 13. | [Four-foot Reflector, equatorially mounted] | [36] |
| 14. | [Drawing of Sunspot] | [53] |
| 15. | [ ] | [53] |
| 16. | [ ] | [56] |
| 17. | [ ] | [57] |
| 18. | [ ] | [57] |
| 19. | [Eclipses of the Sun and Moon] | [69] |
| 20. | [Mercury as a Morning Star. W. F. Denning, 10⁃inch Reflector ] | [85] |
| 21. | [The Tides] | [102] |
| 22. | [Lunar Craters] | [108] |
| 23. | [ ] | [118] |
| 24. | [Mars] | [145] |
| 25. | [Jupiter] | [157] |
| 26. | [Saturn] | [184] |