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 334
trument, in which a hole was alreadybored. Next get a steel wire such as is used for compassneedles, and at the exact middle of it and at right angles to itpass a very thin iron axis through it so that the middle of theaxis and the middle of the needle shall exactly meet; let thisinclination… … Dip Instrument. 2/8 WILLIAM GILBERT rately that it may not turn away from any one degree or pointmarked on the circumference more than from any other, butmay rest easily at any one point. Have the instrument fastenedupright to the face of the post, and on the edge of the baseset a very small…
Magnetism
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