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Document by Carlo Gemmellaro concerning the course of the lava flows on Mount Etna during the eruption of 1852, 21 April 1858.

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Chronology of the eruption of Etna in the spring and summer of 1755 with an eye witness account, 1850s.

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Printed extract from Wolfgang Sartorius Von Waltershausen's Atlas of Etna, note regarding Junghahn's treatment of the double cones of Java and geological sketch of Colanna [presumably Etna], 1857.

Scope and Contents Material relating to the geology of Mount Vesuvius in Southern Italy and Mount Etna in Sicily as extracted from the letters of Sir Charles Lyell, written during a visit to the area in September and October 1858. He discusses several geological formations in the mountains and occasionally gives sketches to illustrate his points. He also mentions: that he has received a list of shells from the Pliocene clay on which Mount Etna is placed which he hopes will provide a precise paleontological...

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Document written by Sir Charles Lyell at Messina on the Island of Sicily describing his visit there in the autumn of 1857. The bulk of the document is spent describing the way lava flows down both steep and gentle slopes and specifically discusses the lava flow resulting from the 9 month long eruption of 1852/3. In addition he discusses the formation of the Val del Bove, 9 November 1857.

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Notes and text for seven lectures looking at the geological history of the American continent, looking at specific locations therein, based partly on results from American survey work. These locations were related to to other places around the world, particularly in Britain and Europe. A variety of geological formations were looked at, including that of the continent itself, considering the materials which make them up and the geological timeframe.

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Letter to Leonard Horner from Sir Charles Lyell discusing the internal structure of lava flows. Lyell also remarks on the probable nature of the additions to the core of Mount Vesuvius that had occurred that year, with illustrations, 10 December 1857.

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Letter to Sir Charles Lyell from Carlo Gemmellaro replying to earlier letters from Lyell to the Gemmellaro family containing questions relating to the geology of Mount Etna. Gemmellaro diagrees with Lyell that the pressure of subsequent layers of lava depress those beneath, with sketch, and mentions the geographical locations of certain features with respect to the map of Wolfgang Sartorius Von Waltershausen which Gemmellaro feels to be accurate, 21 May 1858.

Scope and Contents Letter to Sir Charles Lyell from Carlo Gemmellaro, principally replying to a letter sent to him by Lyell. He mentions the thickness and incline of lava flows of the Balzo of Aci Reale coming down from the side of Mount Etna, with sketch. He answers specific questions that Lyell has put to him in a previous letter regarding details of Gemmellaro's theory, stating that he does not feel himself obliged to accept the opinions of Waltershausen and mentions the discovery of some rocks at a beach...

Scope and Contents Letter to Sir Charles Lyell from Carlo Gemmellaro relating to the geology of the Mount Etna area. Gemmellaro states that Lyell is soon to receive a map copied from Waltershausen's marked with the profile of the extension of the 1852 lava. He mentions his brother's [Giuseppe] gratefulness for Lyell's subscription to the English house at Mount Etna and discusses lava flow at the Balyo di Aci Reale, with map. Apologises for being unable to provide Lyell with measurements for this but states...