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 259
ISAGREEMENTS BETWEEN PIECES OF IRON ON THESAME POLE OF A LOADSTONE ; HOW THEY MAY COMETOGETHER AND BE CONJOINED. If two pieces of iron wire or two needles above the polesof a terrella adhere, when about to be raised to the perpen-dicular they repel each other at their upper ends and present *a… … adhere to the pole obliquely because of their nearness to eachother : either one alone would stand erect and perpendicular.The reason of the obliquity is that A and B, having the sameverticity, retreat from each other and fly apart. For if C be thenorth pole of a terrella, then the ends A and B of…
Magnetism
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