The Barometer

• A barometer is used to measure the pressure present in the atmosphere. The first barometer made its appearance in 1608 when Evangelista Torricelli developed the first model in Florence, Italy.
  
• The first barometer was referred to as "Torricelli's tube" due to its shape.

Galileo is accredited for providing Torricelli with the initial concept that led to the invention of the Barometer. By adding mercury to a four-four long tube and using a dish to create a vacuum, Torricelli became the first scientist to create a vacuum that could sustain for a long period of time. He then realized the potential use for his invention upon realizing that the atmospheric pressure would cause for the mercury in the vacuum to fluctuate in height.

• In 1843, a French scientist named Lucien Vidie created his own version of the barometer which he called the "aneroid barometer" that was a fluidless version of Torricelli's original concept.
• Modern-day barometers follow the same concept that does not require a fluid to be present and display the pressure changes in the atmosphere.

• Bellis, Mary. “Meet Evangelista Torricelli: Inventor of the Barometer.” ThoughtCo, www.thoughtco.com/the-history-of-the-barometer-1992559
  
• Brief History of the Barometer, www.barometer.ws/history.html.