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List of Catira shells by Signor Gaetano Gemmellaro, 1858.

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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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Empty envelope sent from Gaetano Gemmellaro in Catania, Sicily, to Sir Charles Lyell in London, 5 November 1858.

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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.

Scope and Contents Letter to Sir Charles Lyell from Carlo Gemmellaro in answer to a previous letter sent by Lyell. He apologises for not being able to answer Lyell's questions as he has been ill and promises that he will return to Aci to try to detect Wolfgang Sartorius Von Waltershausen's mistakes as to what Mercurio says on the eruption of 1852. He mentions carboniferous soil in Sicily, local units of measurement and lava flow on the island. He also thanks Lyell for sending a printed abstract of the...

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Letter to Sir Charles Lyell from Gaetano Gemmellaro concerning the coast of Sicily, 19 May 1858.

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Letter to Sir Charles Lyell from Gaetano Gemmellaro concerning the geology of Sicily and Mount Etna, 12 February 1858.

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Letter to Sir Charles Lyell from Gaetano Gemmellaro concerning the geology of Mount Etna and Sicily. 6 January 1858.

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Letter to Sir Charles Lyell from Gaetano Gemmellaro concerning the Pliocene epoch on Mount Etna, 18 June 1858.

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Letter to Sir Charles Lyell from Gaetano Gemmellaro regarding the geology of Mount Etna and the surrounding area, 18 February 1858.