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Pierre Petit (8 December 1594〔〔His birth year is sometimes given as 1598.〕 – 20 August 1677) was a French astronomer, physicist, mathematician and instrument maker. Petit was born in Montluçon. He succeeded his father in his municipal office (''Contrôleur de l'élection''), but went to Paris in 1633 to dedicate himself to the sciences. He was a member of the circle around Marin Mersenne, and knew Etienne Pascal, Blaise Pascal, and René Descartes. Later he was a member of the Academy of Montmor. On April 4, 1667, he became a fellow of The Royal Society.〔(Database of all Royal Society fellows ), from (About Us ) at the Royal Society official site〕 He also served as a military engineer and geographer to Louis XIII and Louis XIV, in roles such as Superintendent of Fortifications. He died in Lagny-sur-Marne in 1677. ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pierre Petit (engineer)」の詳細全文を読む スポンサード リンク
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