Ampre, Andr Marie
Ampre, Andr Marie ?mp?r; Fr. Ndr? mr? Np?r [key], 1775?1836, French physicist, mathematician, and natural philosopher. He was professor of mathematics at the cole Polytechnique, Paris, and later at the Collge de France. Known for his contributions to electrodynamics, including the formulation of Ampre's law, he confirmed and amplified the work of Oersted on the relationship of electricity and magnetism, and he invented the astatic needle. The ampere was named for him. His writings include Recueil d'observations lectro-dynamiques (1822) and Essai sur la philosophie des sciences (2 vol., 1834?43, vol. 1 repr. 1838).
See his Correspondance pub. by L. de Launay (3 vol., 1936?43).
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