Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 108
a magnetic needleplaced in differentpositions. The twoneedles near the south pole of the bar direct theirnorth poles towards it, the north pole of the stationarymagnet being too remote to influence them to anyextent. But the needle placed over the centre of thebar has its direction determined by… … to a stationary one. These m.ay be readily observedby carrying a small bar magnet, suspended by astring, or, better, a magnetic needle, mounted uponits stand, slowly round a stationary bar magnet. 92 DAV IS S MANUAL.
