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 109
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. … 145. The arrangement of iron filings around thepoles of a U-magnet, as represented in Fig. 48, Fig, 48. depends upon the directive ten- dency communicated to theminute particles. As will beexplained hereafter, each par-ticle of the filings becomes atemporary magnet, with a northand a south pole,…
