William Gilbert of Colchester, Physician of London: On the Loadstone and Magnetic Bodies and on the Great Magnet the Earth. A New Physiology Demonstrated with Many Arguments and Experiments...J. Wiley & Sons, 1893 - 368 ページ |
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according amber Aristotle armed loadstone attracts iron axis Book called Cardan cause centre Chalybes Chap CHAPTER coition degrees Dict direction distance diurnal motion earth earth's poles east effluvia effluvium electric energy equal equator equinoctial circle experiments fire float friction Georgius Agricola Gilbert greater heat heavens Hence horizon humor instrument iron wire latitude less load loadstone loadstone's London Magnesia magnetic bodies magnetic force magnetic movements magnetic needle magnetized iron mariner's compass mass matter ment meridian meridian circle metals motion move nature netic north pole oblique observations opposite Petrus Peregrinus philosophers piece of iron plane Porta position primum mobile produced properties Ptolemy reason regions repel right line Robert Norman rotation rubbed says Sedini siderites smelted south pole sphere spherical stone stronger substance surface tend terrella things tion turn variation versorium verticity virtue weight whole