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torricelli, evangelista

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Tor·ri·cel·li   (tôr'ə-chěl'ē, tôr'ē-)   
Italian mathematician and physicist who invented the mercury barometer.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Science Dictionary
Torricelli   (tō'rə-chěl'ē)  Pronunciation Key 
Italian mathematician and physicist noted for discovering that the atmosphere exerts pressure. He demonstrated that this pressure affected the level of mercury in a tube, thereby inventing the mercury barometer (1643).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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