Plate Tectonics.- Magma.- Rheology, Magmatic Gases, Bubbles and Triggering of Eruptions.- Mid-Ocean Ridges.- Seamounts and Volcanic Islands.- Continental Intraplate Volcanoes.- Subduction Zone Volcanoes.- Volcanic Edifices and Volcanic Deposits.- Strombolian, Hawaiian and Plinian Eruptions and the Mount St. Helens Eruption 1980.- Pyroclastic Flows, Block and Ash Flows, Surges and the Laacher See Eruption.- Fire and Water.- Volcanic Hazards, Volcanic Catastrophes, and Disaster Mitigation.- Volcanoes and Climate.- Man and Volcanoes: The Benefits.- 16 Physical Units and Abbreviations.- 17 Glossary.- 18 References.- 19 Subject Index.- 20 Index of Geographical Names.- 21 Index of Names.