. A text book of physics, for the use of students of science and engineering . Fig. 717.—Lines of force of two barmagnets, unlike poles together. Fig. Lines of force of two barmagnets, like poles together. Expt. 166.—Lines of force of two bar magnets, like poles Experiment 165, but with the N poles together as in Fig. 718. Expt. 167.—Lines of force by means of iron filings. Place a piece ofdrawing: paper over the magnets in Expts. 164, 165 and 166, and sprinkle. Fig. 719.—Lines of force by means of iron filings. iron filings on the paper. Tap the paper gently until the fi
. A text book of physics, for the use of students of science and engineering . Fig. 717.—Lines of force of two barmagnets, unlike poles together. Fig. Lines of force of two barmagnets, like poles together. Expt. 166.—Lines of force of two bar magnets, like poles Experiment 165, but with the N poles together as in Fig. 718. Expt. 167.—Lines of force by means of iron filings. Place a piece ofdrawing: paper over the magnets in Expts. 164, 165 and 166, and sprinkle. Fig. 719.—Lines of force by means of iron filings. iron filings on the paper. Tap the paper gently until the filings arrangethemselves in lines, as in Fig. 719. Each filing becomes a magnet in thefield of the bar magnet, and the filings then hang together in chains. Bycoating the paper with molten paraffin wax before the experiment andallowing it to cool, a smooth surface is presented to the filings. Afterthey have taken their proper arrangement the lines can be rendered 780 MAGNETISM AND ELECTRICITY CHAP. permanent by passing a bunsen flame over the sheet, which melts the waxand imbeds the filings. Figs. 719, 720 and 721 were obtained in this way.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectphysics
