Chapter XIX: VOLCANOES, PAST AND PRESENT. By Professor EDWARD HULL, LL.D.,

F.R.S.

This volume will treat of the form and structure of volcanic mountains, the materials of which they are composed; of volcanic islands; of tertiary volcanic rocks of the British Isles, Europe, and America; recently extinct or dormant volcanic areas; Etna, Vesuvius; causes of volcanic action and connection with earthquakes, etc. Besides maps and plans, the volume will contain a large number of illustrations showing structure of volcanic mountains, etc., etc.