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 303
eminent and surpassing. Therefore that the cork abidesquietly in the midst, and that the magnetic needle does notmove toward the rim of the vessel, is a fact in accord andagreement with the loadstones nature, as is shown with theaid of a terrella. Here a little iron bar,placed on the stone at* 246… … also toward D in virtue of its power of rotation whereby itconforms itself to the terrella. On this point we shall treatfurther when we consider inclination or the dip of the com-pass. CHAPTER VII. WHY THE VARIATION DUE TO THIS LATERAL CAUSE IS NOTGREATER THAN HITHERTO IT HAS BEEN OBSERVED TOBE,…
Magnetism
Internet Archive · Boston College Libraries · Public Domain Mark 1.0. Free to use for anything.