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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 .. (1893)

Gilbert, William, 1544-1603, Mottelay, Paul Fleury, b. 1841, tr, Wright, Edward, 1558?-1615 · New York, J. Wiley & sons · leaf 263

An illustration from 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 .., 1893, leaf 263
all the direction horizontal because it coincides withthe plane of the horizon; for nautical and horological instru-ments are so constructed that the needle shall be suspendedor supported in equilibrium on a sharp point, which preventsthe dip of the needle, as we shall explain later. And in this… … magnetized bodies would dip below the horizon, and, at thepoles, the directions would be perpendicular, as appears fromour account of the dip. The next figure shows a spherical loadstone cut in two atthe equator; all the points of the needles have been mag-

Magnetism

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