| Figure | | Page |
| 1. | Representation of the diminution of the intensity of light. | 22 |
| 2. | Illustrative of the refraction of light. | 43 |
| 3. | Representing the angles of incidence and refraction. | 44 |
| 4. | The refraction of the atmosphere. | 51 |
| 5. | Various forms of lenses. | 65 |
| 6, | 7, 8. Parallel, converging, and diverging rays. | 66 |
| 9, | 10, 11. Passage of parallel, diverging, and converging rays through convex lenses. | 67 |
| 12. | Passage of parallel rays through concave lenses. | 69 |
| 13. | Images formed by convex lenses. | 71 |
| 14. | Angle of incidence and reflection. | 83 |
| 15. | Images as reflected from a plane mirror. | 84 |
| 16. | Illustrative of reflections from a plane mirror. | 85 |
| 17. | Shewing how the image in a plane mirror is twice the length of the object. | 86 |
| 18. | Reflection from concave mirrors. | 87 |
| 19. | Reflection from convex mirrors. | 89 |
| 20. | Parallel rays as reflected from concave mirrors. | 91 |
| 21. | Diverging rays as reflected from concave mirrors. | 91 |
| 22. | Images formed before concave mirrors. | 93 |
| 23. | Images formed behind concave mirrors. | 96 |
| 24. | Illustrating the magnifying power of concave mirrors. | 97 |
| 25. | Inverted images formed in the front of concave mirrors. | 98 |
| 26. | Illustrative of deceptions produced by concave mirrors. | 100 |
| 27, | 28. Experiment with a bottle half filled with water. | 101 |
| 29. | Effect of extraordinary refraction on ships at sea. | 109 |
| 30. | Experiment for illustrating the causes of uncommon refraction. | 117 |
| 31. | Prismatic spectrum. | 127 |
| 32. | Different foci of coloured rays in convex lenses. | 129 |
| 33. | Experiment to show the different foci of red and violet rays. | 129 |
| 34. | Illustrative of the prismatic colours. | 136 |
| 35. | Explanatory of refraction and reflection from drops of rain. | 147 |
| 36. | Explanatory of the rainbow. | 149 |
| 37. | Images of objects formed in a dark chamber. | 187 |
| 38. | The revolving Camera Obscura. | 194 |
| 39, | 40. The portable Camera Obscura. | 195, 196 |
| 40,* | 41, 42. Illustrative of the angle of vision, and the apparent magnitude of objects. | 206, 207, 208 |
| 43. | The Galilean telescope. | 215 |
THE
PRACTICAL ASTRONOMER.
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