Wright, Mark R., 1854- · London : Longmans · leaf 163
Fig. 149. upon a sheet of cardboard or glass; underneath is placed asingle magnet or a combination of magnets. When the glassis tapped, the filings arrange themselves in curves. The direction … Fig. 150. of the curves at any point is the direction any small needle wouldrest in under the influence of the respective poles. The curvescalled by Faraday, lines of force, begin at a pole, and end ina pole of opposite name. The filings congregate the thickest Terrestrial Magnetism ISS where the…
Physics
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