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WEATHER
Lesson 1 - Page 2

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There have been many historical writings on weather. Hesiod, a Greek poet around 800 BC advised sailors it was safe to go to sea, when the first leaves of the fig tree were the size of a crow’s footprint. Aristotle (384-322 B.C.) wrote 150 philosophical treatises including one called Meteorology. Based on his observations he tried to describe and explain weather such as rain, cloud, mist, dew, snow, hail, wind, thunder, lightning, hurricanes, haloes, and rainbows. Theophrastus (372-287 BC) a Greek philosopher, compiled a book on weather signs that would help farmers and sailors predict the weather.

Meteorology or the science of weather was mainly based on observation. Many weather instruments were not invented until the start of the 1600's. Even the thermometer was not invented until 1714 when Gabriel Fahrenheit of Poland used the freezing of salt water as "zero" degrees. Fresh water would freeze at 32 degrees and boils at 212 degrees. In 1742 Anders Celsius, a Swedish astronomer devised a metric system, by using the freezing of water as zero degrees and boiling at 100 degrees. 


Celsius


Theophrastus

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