Chapter VI: Geology and Mineralogy of the Mountain. 114

Elie de Beaumont's classification of the rocks of Etna.--Hoffman's
geological map.--Lyell's researches.--The period of earliest
eruption.--The Val del Bove.--Two craters of eruption.--Antiquity of
Etna.--The lavas of Etna.--Labradorite.--Augite.--Olivine.--
Analcime.--Titaniferous iron.--Mr. Rutley's examination of Etna
lavas under the microscope.

LIST OF ILLUSTRATIONS.

View of Etna from Catania _To face Title._
Topographical Map of Etna _To face page_ 1
Sections of Etna " 30
Grotto delle Palombe " 36
The Casa Inglesi and Cone of Etna " 52
View of the Val de Bove " 58
View of Etna from Bronte " 66
Island of Columnar Basalt off Trezza " 74
Geological Map of Etna " 114
Map of the Val del Bove (woodcut) 117
Ideal Section of Mount Etna 119
Profile of Etna 121
Sections of Etna Lavas seen under the Microscope, _to face p._ 138

ETNA.

A HISTORY OF THE MOUNTAIN AND OF ITS ERUPTIONS.