Weather Forecasting - Measuring the air's ups and downs
Measuring the air's ups and downs
One of the most important meteorological instruments was the barometerA device that measures air pressure., which measures air pressure changes with a column of mercury that rises and falls. Air pressure differences between two adjoining areas of the atmosphere cause winds, and the barometer made it possible to predict wind velocity patterns. Many people worked on the design and theory of the barometer, but Evangelista Torricelli of Italy (1608–47) is generally credited with developing the first one in 1644.
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