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 260
act, viz., that if therods be rather short, not quite a fingers breadth in length, or * as long as a barley-corn, they will not unite on any terms, norwill they stand up together at all, for in short pieces of wirethe verticity at the ends farthest from the terrella is strongerand the magnetic… … by a very slender thread of silk filaments not twisted butlaid together,and held at the distance of one barley-corns*length from the loadstone, then the opposite ends, A and B,situate within the sphere of influence above the pole, go alittle apart for the same reason, except when they are verynear…
Magnetism
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