in quella Città che hai minacciato più d'una volta di sepellire sotto le tue infocate correnti: allogato, nella mia prima età, in una stanza della casa paterna, che signoreggiava in allora più basse abizioni vicine, ed intiera godeva la veduta della estesa parte meridionalè della tua mole, io non potera non averti di continuo sotto gli occhi, e non essere spettatore dei tuoi visibili fenomeni!" In 1834, M. Elie de Beaumont commenced a minute geological examination of the mountain. His results were published in 1838, under the title of _Recherches sur la structure et sur l'origine du Mont Etna_, and they extend over 225 pages.[11] He re-determined the latitude and longitude of the mountain, measured the slope of the cone, and the diameter of the great crater, and minutely examined the structure of the rocks at the base of the mountain. He also gives a good sectional view, elevations taken from each quarter of the compass, and a geological map, which although accurate in its general details, can scarcely be considered very satisfactory. A relief map of Etna, a copy of which is in the Royal School of Mines, was afterwards constructed from the flat map, and this was, we believe, at the same time, the first geological map, and the first map in relief, which had been made of the mountain. Elie de Beaumont considers granite as the basis of the mountain, because it is sometimes ejected from the crater; old basaltic rocks appear in the Isole dei Ciclopi, and near Paterno, Licodia, and Aderno; _cailloux roulés_ near Motta; ancient lavas on each side of the Val del Bove; modern lavas in every part of the mountain, and calcareous and arenaceous rocks in the surrounding mountains. [11] Printed in vol. IV. of _Mémoires pour servir a une description Geologique de la France_. Par M.M. Dufrénoy et Elie de Beaumont. In 1836, Abich published some excellent sections of Etna, and an accurate view of the interior of the crater, in a work entitled _Vues illustratives de quelques Phénomènes Géologiques prises sur le Vésuve et l'Etna pendant les années 1833 and 1834_. The whole of the thirteenth volume (1839) of the Berlin _Archiv für Mineralogie, Geognosie, Berghau und Hüttenkunde_, is occupied by an elaborate memoir on the geology of Sicily[12] by Friedrich Hoffmann, accompanied by an excellent geological map. A long account of the geology of Etna is given, and an enlarged map of the mountain was afterwards constructed and published in the _Vulkanen Atlas_ of Dr. Leonhard in 1850.[13] [12] Entitled _Geognostiche Beobachtungen Gesammelt auf einer Reise durch Italian und Sicilien, in den jahren 1830 bis 1832, von Friedrich Hoffmann_. [13] _Vulkanen Atlas zur naturgeschichte der Erde von K. G. Von Leonhard._ Stuttgardt. 1850.