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 190
or retard. Nor is thewhole of the force suppressed by a plate of iron, but in partdiverted. For when the force enters the middle of an ironplate placed within the sphere of magnetic influence or directl)^* over the pole of the loadstone, that force is distributed chieflyto the extremities, so that… … die ; it has the same verticity at both ends. In the figure,CD is a long rod magnetized in the middle by the north poleE \ C is a south end or south pole, and D is another south end.But here note the singular fact, that a needle magnetized bythat pole turns to that pole, though the round plate…
Magnetism
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