Tunzelmann, George William von, 1856- · New York, Scribner & Welford · leaf 65
in contact with its under surface, and then dusting 52 ELECTRICITY IN MODERN LIFE. the filings upon the upper surface, tapping the card slightlyduring the process. The further pole of the magnet willbe so far from the card that it will not produce any sensibleeffect, so that the field will be… … shown in Fig. i. In this way, of course, we only obtain arepresentation of a section of the field of force. If we couldobtain a single separate magnetic pole—which, as a matterof fact, is impossible—the magnetic field surrounding itwould be of a character exactly similar to the field of…
Electric industries · Electricity
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