A hydrochronometer is a kind of water clock.
In 1867 Fr. Giovan Battista Embriaco, O.P., inventor and professor of the College of St. Thomas in Rome, created a hydrochronometer [1] and sent it to the Paris Universal Exposition of 1867, where it received many prizes. It had the shape of a wooden pinnacle made of cast iron fused as a tree trunk, while its four dials were visible from all directions.
In 1873, the water clock was returned to Rome and placed in Villa Borghese gardens into a fountain realized by the architect Gioacchino Ersoch. It is still there and works constantly.
In June 2007, after two years of restoration at ELIS School, it was restarted by the Town Mayor of Rome.
Another hydrochromometer can be found at Palazzo Berardi, rione Pigna, Rome.
E' infatti del 1867 l'invenzione dell'idrocronometro, dovuta al padre domenicano Giovanni Battista Embriaco, che attese ai suoi studi di meccanica applicata all'orologeria nella solitudine del convento della Minerva.
Leon Battista Alberti was an Italian Renaissance humanist author, artist, architect, poet, priest, linguist, philosopher, and cryptographer; he epitomised the nature of those identified now as polymaths. He is considered the founder of Western cryptography, a claim he shares with Johannes Trithemius.
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The Pincian Hill Italian: Pincio[ˈpintʃo]; Latin: Mons Pincius) is a hill in the northeast quadrant of the historical centre of Rome. The hill lies to the north of the Quirinal, overlooking the Campus Martius. It was outside the original boundaries of the ancient city of Rome, and was not one of the Seven hills of Rome, but it lies within the wall built by Roman Emperor Aurelian between 270 and 273.
The Exposition Universelle of 1867, better known in English as the 1867 Paris Exposition, was a world's fair held in Paris, France, from 1 April to 3 November 1867. It was the second of ten major expositions held in the city between 1855 and 1937. A number of nations were represented at the fair. Following a decree of Emperor Napoleon III, the exposition was prepared as early as 1864, in the midst of the renovation of Paris, marking the culmination of the Second French Empire. Visitors included Tsar Alexander II of Russia, a brother of the King William and Otto von Bismarck of Prussia, Prince Metternich and Franz Josef of Austria, Ottoman Sultan Abdülaziz, and the Khedive of Egypt Isma'il.
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