Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . Fig. 88. si 224. Let the north pole of a steel magnet, N S(Fig. 88), be placed on the middle of a bar of iron. The part of the bar in contactwith the magnet becomes asouth pole, while north polarity-is distributed alorjg both halvesof the bar. 225. If several pieces of ironwire, of the same length, besuspended from a magnetic pole,they do not hang parallel; butthe lower ends diverge fromeach other, in consequence oftheir all receiving the same polarit
Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . Fig. 88. si 224. Let the north pole of a steel magnet, N S(Fig. 88), be placed on the middle of a bar of iron. The part of the bar in contactwith the magnet becomes asouth pole, while north polarity-is distributed alorjg both halvesof the bar. 225. If several pieces of ironwire, of the same length, besuspended from a magnetic pole,they do not hang parallel; butthe lower ends diverge fromeach other, in consequence oftheir all receiving the same polarity by 142 D AVI S S MANU AL. while the upper ends are retained in their places bythe attraction of the magnet. Let two short piecesof iron wire be suspended by threads of equal length,fastened to one end of each piece, so that the wiresmay hang in contact. If, now, the south pole of amagnet be placed below the wires, the lower endsof both will become north poles, and their upper endssouth poles; and the wires will recede from eachother. This divergence increases as the magnet isbrought nearer, until it reaches a certain limit, whenthe attraction of the magnet for the lower poles over-powers their mutual repulsion, and causes them toapproach each other; while the repulsion of theupper ends remains as before. 226. The mutual repulsion of two pieces of ironmagnetized by induction may also be shown by theFiff. 89. arrangement represented in Fig. are two short pieces of iron wire,upon the ends of which are securedlittle brass rings, which answer the pur-pose of rollers. The two wires be
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmagnetism, bookyear18
