Giovanni Battista Baliani

[1] On 27 July 1630, Baliani wrote a letter to Galileo explaining an experiment he had made in which a siphon, led over a hill about 21 m high, failed to work.

[2][3] At Savona, from the Priamar Fortress, he repeated Galileo's experiment of the Tower of Pisa, obtaining more precise measurements which allowed him to underline the effect of air attrition.

He also conducted an experiment to show the heat generated by a pot full of water, which he had boiled after rotating it at high speed.

[citation needed] He also studied tides, supporting Galileo's theory that they were generated by the Earth's motion around the Sun.

His arguments were published by Giovanni Battista Riccioli in his Almagestum novum (1651) and later resumed by John Wallis and Isaac Newton.