" 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. Volcanoes: Past and Present. PART I. INTRODUCTION. CHAPTER I. HISTORIC NOTICES OF VOLCANIC ACTION.