The barometer is an instrument for measuring atmospheric pressure. The pressure indicated can aid in predicting short term weather.
There are two main types of barometer in use, the mercury barometer, which can either be in the form of a "stick" or a "wheel", and the aneroid barometer, a later invention and most commonly available.
Italian Evangelista Torricelli, an associate of Galileo, is generally credited with inventing the mercury barometer in 1643. Galileo suggested to Evangelista Torricelli that he use mercury in his vacuum experiments.
A mercury barometer has a glass tube with a height of at least 84 cm, more...
The Admiral Fitzroy barometer is named after Robert Fitzroy, an English Royal Navy officer and meteorologist. Fitzroy is best known for his role as the captain of HMS Beagle during Charles Darwin's famous voyage of exploration in the 1830s.
Fitzroy was a pioneer in the field of meteorology and was deeply concerned about the safety of ships at sea. He realised that there was a need for a reliable and easy-to-use instrument that would allow sailors to predict changes in weather conditions. In response to this need, he designed a barometer that could be used on ships more...
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