FANTONI, Pio.

Relazione della visita fatta per ordine di sua maesta imperiale Leopolodo II dal matematico canonico Pio Fantoni nel mese di Giugno MDCCXC al Canal Maestro di Valdichiana e considerazioni sopra il nuovo progetto di abbassare il regolatore di Valiano.

Florence, per Gaetano Cambiagi Stampatore Granducale, 1791. Small folio (310 x 220 mm.), pp. 52, with 6 plates (3 engraved, 3 printed, one with engraved elements, one folding); a fine copy in the original carta rustica, Ms. title on spine. First edition of the hydraulic engineer Pio Fantoni's arbitration in the quarrel between two engineers in how to tackle the drainage and reclamation of swampy land in the Valdichiana valley near Siena. The reclamation of the Valdichiana had long been considered and at various stages in history Galileo, Viviani and Torricelli had all been asked to come up with solutions. None had succeeded. Fantoni (1721-1804) was considered the most important Italian hydraulic engineer of his time and his measured conclusion in this case where he weights and discusses the different proposals evenly, got the project finally off the ground. Fantoni led his considerable support to the theories of Vittorio Fossombroni (1754-1844) who argued for changing the incline of the valley. The reclamation project was finally started in 1816 following Fossombroni's idea and in a few years the valley was transformed into one of the most prosperous of the region.The work was beautifully produced by the ducal printer and was paid for by Fantoni's patron, the recently elected Holy Roman Emperor Leopold II, also Grand Duke of Tuscany until 1790.Riccardi I, 446.

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• 订书号：: A1224

• 书商: Bernard Quaritch Ltd. (GREAT BRITAIN)