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 204
iron on the pole of the terrella raises the piece of iron to the *perpendicular, so, at the side, the iron is not directed towardthe centre, but stands oblique and sticks everywhere; for inthe iron ball the pole is ever the point of contact with the ter-rellas pole, and it is not constant, as it is…
Magnetism
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