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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 173

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 173
onger, those remotest are the weaker; yet in all theenergy is in some sense equal. In the figure of a terrella,A, B, are the poles, CD is the equinoctial line; the greatestattractive force is seen at A and B. At C and Z* there is noforce that attracts to the body the ends of magnetic objects, ii6… … pulled in contrary directions, does not cling steadily, but itstays and adheres to the stone only when it falls to either sideof the line. At E the attractive force is greater that at F, forE is nigher the pole. And this is not for the reason that thereis more energy resident at the pole, but…

Magnetism

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