An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 147
e first tosee that a true understanding of the action of magnets couldbe had only by studying the empty space around them, as wellas the magnets themselves. The familiar experiment of sprin-kling iron filings on a cardboard placed over a magnet (Fig. ii)Shows very quickly and clearly the magnetic… … Fig. 70. — Bar magnet with two consequent poles. reenter the S-pole and thus complete the circuit from the S-poleto the tf-pole through the magnet itself. Every line musthave a complete circuit; as we have said before, it is impossible,therefore, to have a magnet with only one pole. These mag-netic…
Electricity · Magnetism
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
