. Bulletin - United States National Museum. Science. &.*. ^Hor. Figure 2.—"Galvanometer"' was the name given by Bischof to this goldleaf electrostatic instrument in 1802, 18 years before Ampere coupled the word with the use of Oersted's electromagnetic experiment as an indicating devii I-. announcement of the magnetic effects of a voltaic circuit, on July 21, Oersted's Discovery Man) writers have expressed surprise that with all the use made of voltaic cells after 1800, including the enormous cells that produced the electric arc and vaporized wires, no one for 20 years hap
. Bulletin - United States National Museum. Science. &.*. ^Hor. Figure 2.—"Galvanometer"' was the name given by Bischof to this goldleaf electrostatic instrument in 1802, 18 years before Ampere coupled the word with the use of Oersted's electromagnetic experiment as an indicating devii I-. announcement of the magnetic effects of a voltaic circuit, on July 21, Oersted's Discovery Man) writers have expressed surprise that with all the use made of voltaic cells after 1800, including the enormous cells that produced the electric arc and vaporized wires, no one for 20 years happened to see a deflection of any of the inevitable nearby compass needles, which were a basic component of the scien- tific apparatus kept by any experimenter at this time. Yet so it happened. The surprise is still greater when one realizes that many of the contemporary natural philosophers were firmly persuaded, even in the absence of positive evidence, that there must be a connection between electricity and magnetism. Oersted himself held this latter opinion, and had been seeking electromagnetic relationships more or less deliberately for several years before he made his decisive observations. His familiarity with the subject was such that he fully appreciated the immense importance of his discovery. This accounts for his employing a rather uncommon method of publication. Instead of sub- mitting a letter to a scientific society or a report to the editor of a journal, he had privately printed a four-page pamphlet describing his results. This, he forwarded simultaneously to the learned societies and outstanding scientists all over Europe. Written in Latin, the paper was published in various journals in English, French, German, Italian and Danish during the next few In summary, he reported that a compass needle experienced deviations when placed near a wire connecting the terminals of a voltaic batter)-. He described fully how the direction and magnitude of the needle
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