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 346
uator A to C, it lays holdof the stone with its point C as though with a long outspreadwing, when the point reaches the parts around B, which giveit a greater revolution than those at C. And the ends of DIP NOT CAUSED BY ATTRACTION OF LOADSTONE. 289 rather long pieces of wire or little rods are… … or pieces of iron on the surface of a terrella should not have along but a very short axis, so that they may dip true and nat-urally ; for a long versorium situated near a terrella does noteasily stand in a right sphere on the horizon, and wavers andsuddenly dips to one side or the other,…
Magnetism
Internet Archive · Boston College Libraries · Public Domain Mark 1.0. Free to use for anything.