Abstract
The discovery in 1820 by Hans Christian Oersted (1777–1851) of the magnetic field that surrounds a conductor during the passage of an electric current, aroused a wave of interest among men of science in England, France, Germany, Italy, and the United States. The apparatus required to verify his results was easily put together, and anyone who cared to do so could see for himself the nature of the indissoluble connection between electricity and magnetism, which, though long suspected and vaguely adumbrated, was now precisely defined and made a permanent portion of the corpus of science. As one subsequent discovery after another was announced from various places, the recognition became widespread that a large and unexploited field for investigations and applications had been opened up. Only one week after word of Oersted’s experiment reached Paris, André-Marie Ampère (1775–1836) discovered that two parallel wires carrying parallel currents attract each other. Less than two months after Oersted’s publication, J.S.C. Schweigger (1779–1857), at the University of Halle, reasoned that if the current in a single wire held above the compass needle would deflect the needle to the right, while the same wire placed beneath the needle would deflect it to the left, one turn of wire, placed around the needle in the plane of the magnetic meridian, would exert twice the deflecting force of a single wire; and a coil made of ten turns of insulated wire would exert twenty times the force. Thus were born Schweigger’s multiplier and Ampère’s solenoid. In rapid succession followed the electromagnet (Arago and Davy), the astatic galvanometer (Nobili), electromagnetic rotations (Wollaston and Faraday), and the science of electrodynamics (Ampère).
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Notes
A. Fresnel, Annales de Chimie et de Physique, 1820, [2], Vol. 15, pp. 219–222. Reprinted in Coll. Vol.2, pp. 76-79.
A.M. Ampère, Journal de Physique, 1821, Vol. 93, p. 447; reprinted in Coll., Vol. 2, pp. 212-237.
A. de La Rive, Bibliothèque Universelle, 1822, Vol. 21, p. 29; and Annales de Chimie et de Physique, 1822, [2], Vol. 21, pp. 24-48; reprinted in Coll., Vol. 2, pp. 308-328.
F. Arago, Annales de Chimie et de Physique, 1824, [2], Vol 27, p. 263; ibid., 1825, [2], Vol. 28, p. 325.
A.C. Becquerel, Annales de Chimie et de Physique, 1824, [2], Vol. 25, pp. 269–278.
[M. Faraday,] Quarterly Journal of Science, Literature, and the Arts, 1825, Vol. 19, p. 338.
A.-M. Ampère, ‘Expériences sur les Courans électriques produits par l’Influence d’un autre Courant,’ Annales de Chimie et de Physique, 1831, [2], Vol. 48, pp. 405–412.
S.P. Thompson, ‘Note on a neglected Experiment of Ampère,’ Phil. Mag. 1895, [5], Vol. 39, pp. 534–541.
Joseph Henry, ‘On the Production of Currents and Sparks of Electricity from Magnetism’ American Journal of Science and Arts, 1832, Vol. 22, pp. 403–408
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© 1991 Springer Science+Business Media Dordrecht
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Ross, S. (1991). The Search for Electromagnetic Induction 1820–1831. In: Nineteenth-Century Attitudes: Men of Science. Chemists and Chemistry, vol 13. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3588-7_3
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DOI: https://doi.org/10.1007/978-94-011-3588-7_3
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