| 1. | April | 1877. | Brigandage in Sicily. |
| 2. | July | ” | Copernicus in Italy. |
| 3. | Jan. | 1878. | Harvey and Cesalpino. |
| 4. | July | ” | Origin and Wanderings of the Gypsies. |
| 5. | Jan. | 1879. | Campanella and Modern Italian Thought. |
| 6. | Oct. | ” | Spedding’s Life of Bacon. |
| 7. | July | 1880. | The English Precursors of Newton. |
| 8. | Oct. | ” | The Chemistry of the Stars. |
| 9. | Oct. | 1881. | Albania and Scanderbeg. |
| 10. | July | 1882. | Don Sebastian and his Personators. |
| 11. | April | 1883. | Volcanoes and Volcanic Action. |
| 12. | Oct. | 1883. | Prowe’s Life of Copernicus. |
| 13. | July | 1884. | The Future of the Congo. |
| 14. | Oct. | ” | Mountain Observatories. |
| 15. | Oct. | 1885. | The Faith of Iran, Lady Marian. |
| 16. | July | 1886. | Alford on Art Needlework. |
| 17. | Oct. | ” | The Aurora Borealis. |
| 17a. | Jan. | 1887. | The House of Douglas. |
| 18. | July | ” | The Life and Works of Giordano Bruno. |
| 19. | Jan. | 1888. | Sidereal Photography. |
| 20. | Oct. | ” | The Law of Storms. |
| 21. | Oct. | 1889. | East Africa. |
| 22. | July | 1890. | Life and Works of Lavoisier. |
| 23. | April | 1891. | Scandinavian Antiquities. |
| 24. | Oct. | ” | A Moorland Parish. |
| 25. | April | 1892. | The Ice Age in North America. |
| 26. | July | ” | The Discovery of America. |
| 27. | April | 1893. | Proctor’s Old and New Astronomy. |
| 28. | Oct. | ” | Sir H. Howarth on the Great Flood. |
| 29. | Jan. | 1894. | Among the Hairy Ainus. |
| 30. | April | ” | The Liquefaction of Gases. |
| 31. | Oct. | ” | The Letters of Edward FitzGerald. |
| 32. | July | 1895. | Problems of the Far East. |
| 33. | Oct. | ” | Argon and Helium. |
| 34. | Oct. | 1896. | New Views about Mars. |
| 35. | July | 1897. | Two Recent Astronomers. |
| 36. | April | 1898. | Recent Solar Eclipses. |
| 37. | Oct. | ” | Ethereal Telegraphy. |
| 38. | April | 1899. | The Origin of Diamonds. |
| 39. | Oct. | ” | The November Meteors. |
| 40. | April | 1900. | The Evolution of the Stars. |
| 41. | Oct. | ” | Hermann von Helmholtz. |
| 42. | July | 1901. | Temporary Stars. |
| 43. | July | 1902. | The last Voyage of Ulysses. |
| 44. | Jan. | 1903. | Double Stars. |
| 45. | Oct. | ” | The Revelations of Radium. |
| 46. | Jan. | 1904. | Fahie’s Life of Galileo. |
| 47. | July | ” | Life in the Universe. |
| 48. | April | 1905. | Earthquakes and the New Seismology. |
| 49. | July | 1906. | A Representative Philosopher. |
| 50. | Jan. | 1907. | The Old and the New Alchemy. |
