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 106
as would a strongloadstone. That this is so you may learn from the followingexperiment: A small piece of cork, round, and the size of afilbert, has an iron wire passed through it to the middleof the wire: float this in still water and approach (withoutcontact) to one end of that wire, the end of… … wire rising a little out of the water, C the end of the secondwire, which pulls B. You may demonstrate the same thingwith a larger mass of iron. Suspend in equilibrium with aslender silken cord a long rod of polished iron, such as are usedto support hangings and curtains ; bring within the distance…
Magnetism
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