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 221
he b pole of the same, if turned skyward,can raise to the erect position. And the a pole of the smallterrella derives force from the greater, turning from zenith to *the plane of the horizon or to the level. Now if, the smallerterrella having its poles directed as before, you apply a piece 164…
Magnetism
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