Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . to a stationary one. These 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 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 filin
Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . to a stationary one. These 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 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, while at-tached to the steel magnet. Thefilings are held together by theirmutual attractions, and, having\Kthus ereat freedom of motion,i^ V^-r /i;.;i\\\\ readily obey the directive miiu-ence exerted upon them. 146. Spread a thin covering of iron filings over asheet of paper, or thin pasteboard, and place a power-ful U-magnet vertically beneath it, with the polesclose to the paper. The dotted lines in the cut () show the arrangement which the particles of iron will assume. Each onebecomes a magnet withpoles, and connectsitself with those ad-Yi^-li-}- joining it, so as to formcurved lines of a peculiarcharacter. This experi-ment may be performed11 a still more satisfactory manner, by supp
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmagnetism, bookyear18
