(Rare Books, Manuscripts, Maps & Photography, 31st January 2019) [CORSINI, EDOARDO] RAGIONAMENTO ISTORICO SOPRA LA VALDICHIANA IN CUI SI DESCRIVE L'ANTICO, E PRESENTE SUO STATO Florence: Francesco Moücke, 1742. First edition, 4to., with a large folding engraved map of the Val di Chiana comprising three folio sheets (41 by140 cm), contemporary vellum, Leo S. Olschki label and book plate of John BuryNote: The Val di Chiana is a valley of central Italy, one hundred kilometres long, which covers the provinces of Arezzo, Siena and Perugia. Its name derives from the Chiana which rises near Arezzo, flows between the Arno and Tiber. In prehistoric times the valley was occupied by the Arno, which then flowed to the Tiber. When a natural dam formed by alluvial deposits diverted the Arno to the northwest, the Chiana drained to the Tiber; but another natural dam at Chiusi prevented proper drainage, and during medieval times the Chiana valley became marshy and malarial. Re-interest was kindled in the early 18th century in drying to resolve the drainage and hydraulic systems. In 1788 detailed engineering plans made by Vittorio Fossombroni were put into effect, and the work was completed between 1826 and 1838. The watershed was moved southward, and, as a result, the Chiana valley drains partly to the Arno and partly to the Tiber. Almost entirely reclaimed for cultivation, the valley now forms a fertile and productive agricultural region.
(Rare Books, Manuscripts, Maps & Photography, 31st January 2019) [CORSINI, EDOARDO] RAGIONAMENTO ISTORICO SOPRA LA VALDICHIANA IN CUI SI DESCRIVE L'ANTICO, E PRESENTE SUO STATO Florence: Francesco Moücke, 1742. First edition, 4to., with a large folding engraved map of the Val di Chiana comprising three folio sheets (41 by140 cm), contemporary vellum, Leo S. Olschki label and book plate of John BuryNote: The Val di Chiana is a valley of central Italy, one hundred kilometres long, which covers the provinces of Arezzo, Siena and Perugia. Its name derives from the Chiana which rises near Arezzo, flows between the Arno and Tiber. In prehistoric times the valley was occupied by the Arno, which then flowed to the Tiber. When a natural dam formed by alluvial deposits diverted the Arno to the northwest, the Chiana drained to the Tiber; but another natural dam at Chiusi prevented proper drainage, and during medieval times the Chiana valley became marshy and malarial. Re-interest was kindled in the early 18th century in drying to resolve the drainage and hydraulic systems. In 1788 detailed engineering plans made by Vittorio Fossombroni were put into effect, and the work was completed between 1826 and 1838. The watershed was moved southward, and, as a result, the Chiana valley drains partly to the Arno and partly to the Tiber. Almost entirely reclaimed for cultivation, the valley now forms a fertile and productive agricultural region.
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
