| Fig. 1. | Eruption of Vesuvius, 1872–73 | Frontispiece |
| " 2. | Cotopaxi | Page 16 |
| " 3. | Volcanic Cone of Orizaba | " 21 |
| | Map of the World, showing Active and Extinct Volcanoes | " 23 |
| " 4. | Teneriffe, seen from the Ocean | " 31 |
| " 5. | View of the Summit of Teneriffe | " 35 |
| " 6. | Probable Aspect of Vesuvius at Beginning of Christian Era | " 43 |
| " 7. | View of Vesuvius before 1767 | " 50 |
| " 8. | Map of District bordering Bay of Naples | " 52 |
| " 9. | View of Vesuvius in 1872 | " 53 |
| " 10. | Ideal Section through Etna | " 63 |
| " 11. | Map of the Lipari Islands | " 70 |
| " 12. | The Island of Vulcano in Eruption | " 71 |
| " 13. | Ideal Section through Gulf of Santorin | " 76 |
| " 14. | Bird's-eye View of Gulf of Santorin | " 79 |
| " 15. | Ground Plan of Rocca Monfina | " 80 |
| " 16. | Geological Section of Tiber Valley at Rome | " 88 |
| " 17. | Generalised Section Through the Vale of Clermont | " 93 |
| Fig. 18. | View of Puy de Dôme and Neighbouring Volcanoes | Page 95 |
| " 19. | Mont Demise, seen from the S.E. | " 103 |
| " 20. | Sketch Map of Rhenish Area in the Miocene Epoch | " 114 |
| " 21. | The Volcanic Range of the Siebengebirge | " 117 |
| " 22. | Section of Extinct Crater of the Roderberg | " 120 |
| " 23. | Plan and Section of the Laacher See | " 122 |
| " 24. | Extinct Craters in the Jaulân | " 130 |
| " 25. | Mount Shasta | " 139 |
| " 26. | Forms of Volcanic Tuff-Cones, Auckland | " 148 |
| " 27. | "The White Rocks," Portrush, Co. Antrim | " 157 |
| " 28. | Section across the Volcanic Plateau of Antrim | " 159 |
| " 29. | Section at Templepatrick | " 161 |
| " 30. | Cliff above the Giant's Causeway | " 163 |
| " 31. | The Giant's Causeway, Co. Antrim | " 165 |
| " 32. | "The Chimneys," North Coast of Antrim | " 166 |
| " 33. | Section at Alt na Searmoin, Mull | " 175 |
| " 34. | View of the Scuir of Eigg from the East | " 181 |
| | Map of Volcanic Band of the Moluccas | " 200 |
| " 35. | Map of the Krakatoa Group of Islands | " 203 |
| " 36. | Section from Verlaten Island through Krakatoa | " 204 |
| Fig. 37. | Isoseismals of the Charleston Earthquake | Page 223 |
| " 38. | Photograph of the Moon's Surface | " 241 |
| " 39. | Portion of the Moon's Surface | " 243 |
| PLATES. |
| I. & II. | Magnified Sections of Vesuvian Lavas. |
| III. & IV. | Magnified Sections of Volcanic Rocks. |
