What scientific instrument did Evangelista Torricelli invent?

Evangelista Torricelli is best known for inventing the barometer, an instrument used to measure atmospheric pressure. The development of the barometer was a significant advancement in meteorology, allowing scientists to predict weather changes and improve understanding of atmospheric phenomena. Torricelli's barometer operates based on the principle that a column of liquid, typically mercury, will rise or fall in response to changes in air pressure. This invention provided crucial insights into the behavior of gases and the physics of fluids, laying the groundwork for future developments in both meteorology and physics. The barometer remains a fundamental tool used in various scientific and industrial applications today, which highlights its lasting significance.