# Hydrochronometer

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Embriaco's hydrochronometer in the Villa Borghese gardens

A hydrochronometer at Palazzo Berardi, Rome

A **hydrochronometer** is a kind of [water clock](/source/Water_clock).

In 1867 Fr. Giovan Battista Embriaco, O.P., inventor and professor of the [College of St. Thomas](/source/Pontifical_University_of_Saint_Thomas_Aquinas) in Rome, created a hydrochronometer[1] and sent it to the [Paris Universal Exposition](/source/International_Exposition_(1867)) 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](/source/Villa_Borghese_gardens) into a fountain realized by the architect [Gioacchino Ersoch](/source/Gioacchino_Ersoch). It is still there and works constantly.

In June 2007, after two years of restoration at [ELIS School](http://www.elis.org), it was restarted by the Town Mayor of Rome.

Another hydrochromometer can be found at Palazzo Berardi, [rione Pigna](/source/Pigna_(rione_of_Rome)), Rome.

## Notes

1. **[^](#cite_ref-1)** ["Orologi"](https://web.archive.org/web/20141205090500/http://www.casanatense.it/index.php/it/gli-editoriali/72-stampe-e-disegni/153-orologi.html?showall=1). Archived from [the original](http://www.casanatense.it/index.php/it/gli-editoriali/72-stampe-e-disegni/153-orologi.html?showall=1) on 5 December 2014. Retrieved 20 March 2013. 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.

## External links

- [https://web.archive.org/web/20100419133812/http://www.orologiodelpincio.it/en/homepage](https://web.archive.org/web/20100419133812/http://www.orologiodelpincio.it/en/homepage)

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Adapted from the Wikipedia article [Hydrochronometer](https://en.wikipedia.org/wiki/Hydrochronometer) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Hydrochronometer?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.