my life after graduate: Greatest Inventions, Vol. 11

Thursday, November 30, 2006

Greatest Inventions, Vol. 11

Windmill

The windmill was invented in 634 for a Persian caliph and was used to grind corn and
draw up water for irrigation. In the vast deserts of Arabia, when the seasonal streams ran dry, the only source of power was the wind which blew steadily from one direction for months. Mills had six or 12 sails covered in fabric or palm leaves. It was 500 years before the first windmill was seen in Europe.

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