= Letter to Michelangelo Ricci concerning the Barometer by Evangelista Torricelli
{c}
{tag=Work by Evangelista Torricelli}
{title2=1644}
By <Evangelista Torricelli>.
https://web.lemoyne.edu/giunta/torr.html
Original letter in English translation inspected, Florence 11 June 1644. Linked source identifies 1919 collected works and Magie 1935 reproduction; translator not established. Includes equal-height test for different upper-space volumes and mercury/water density comparison.
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