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He discovered sodium and potassium, among other things
http://wiki.answers.com/Q/Why_is_Sir_Humphry_Davy_...
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he was the first person to invent electric light bulbs.
http://wiki.answers.com/Q/Why_is_he_famous_Sir_Hum...
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(1778–1829) British chemist, who studied gases at the Pneumatic Institute in Bristol, where he discovered the anaesthetic properties of dinitrogen oxide (nitrous oxide). He
http://www.answers.com/topic/sir-humphry-davy-1
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Humphry Davy's mother was called Grace Millett. She came from a previously wealthy family but her parents died within minutes of each other from malignat fever. Her and her two sisters
http://wiki.answers.com/Q/Who_was_sir_humphry_davy...
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