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ASTRONOMY WITH AN OPERA-GLASS.
481
Fig. 1.—Map of the Moon.
Seas, Gulfs, and Marshes.
| A. The Crisian Sea. | I. The Marsh of Mists. | R. The Bay of Dew. |
| B. Humboldt Sea. | K. The Marsh of Putrefaction. | S. The Sea of Clouds. |
| C. The Sea of Cold. | L. The Sea of Vapors. | T. The Sea of Humors. |
| D. The Lake of Death. | M. The Central Gulf. | V. The Sea of Nectar. |
| E. The Lake of Dreams. | N. The Gulf of Heats. | X. The Sea of Fertility. |
| F. The Marsh of Sleep. | O. The Sea of Showers. | Z. The South Sea. |
| G. The Sea of Tranquillity. | P. The Bay of Rainbows | |
| H. The Sea of Serenity. | Q. The Ocean of Storms. |
Mountains and Crater Rings.
| 1. | Grimaldi. | 15. | Walter. | 29. | Langrenus. | 42. | Plato. |
| 2. | Letronne. | 16. | Regiomontanus. | 30. | Proclus. | 43. | Archimedes. |
| 3. | Gassendi. | 17. | Purbach. | 31. | Cleomedes. | 44. | The Apennines. |
| 4. | Euclides. | 18. | Arzachel. | 32. | Atlas. | 45. | Eratosthenes. |
| 5. | Bullialdus. | 19. | Alphonsus. | 33. | Hercules. | 46. | Copernicus. |
| 6. | Pitatus. | 20. | Ptolemaus. | 34. | Posidonius. | 47. | The Carpathian Mts. |
| 7. | Schickhard. | 21. | Hipparchus. | 35. | Plinius. | 48. | Timocharis. |
| 8. | Longomontanus. | 22. | Albategnius. | 36. | Menelaus. | 49. | Lambert. |
| 9. | Tycho. | 23. | Theophilus. | 37. | Manilius. | 50. | Euler. |
| 10. | Maginus. | 24. | Cyrillus. | 38. | The Caucasus Mountains. | 51. | Aristarchus. |
| 11. | Clavius. | 25. | Catharina. | 52. | Kepler. | 53. | Flamsteed. |
| 12. | Newton. | 26. | The Altai Mountains. | 39. | Eudoxus. | ||
| 13. | Maurolyeus. | 27. | Piccolomini. | 40. | Aristotle. | ||
| 14. | Stöfler. | 28. | Petavius. | 41. | The Alps. |
The early selenographers certainly must have been men of vivid imagination, and the romantic names they gave to the lunar landscapes, and particularly to the "seas," add a charm of their own to the study of the moon. Who would not wish to see the "Bay of
