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While preparing an account of Mount Etna for the Encyclopædia Britannica, I was surprised to find that there exists no single work in the English language devoted to the history of the most famous volcano in the world. I was consequently induced to considerably enlarge the Encyclopædia article, and the following pages are the result. The facts recorded have been collected from various sources—German, French, Italian, and English, and from my own observations made during the summer of 1877. I desire to express my indebtedness to Mr. Frank Rutley, of H.M. Geological Survey, for his careful examination of the lavas which were collected during my ascent of the mountain, and for the account which he has written of them; also to Mr. John Murray for permission to copy figures from Lyell's "Principles of Geology." My thanks are also due to Mr. George Dennis, H.M. Consul-General in Sicily; Mr. Robert O. Franck, Vice-Consul in Catania; and to Prof. Orazio Silvestri, for information with which they have severally supplied me.

G. F. RODWELL.

Marlborough,

September 6th, 1878.