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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 359

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 359
great circle, or meridian, passing through the zenithand the point of variation in the horizon, and through thatlowermost point of the heavens called nadir: all this is demon-strated by bringing a rather long magnetized needle near 302 WILLIAM GILBERT. the vessel on one side. This is a… … difficult as this experiment is, so it does not continue, for theapparatus does not remain in the midst of the water, but atlast sinks to the bottom when the cork has taken in too muchwater.^ 1 It is also manifest in a needle pierced through a globe of cork so cutaway and pared by degrees that it…

Magnetism

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