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 113
n gas burner quickly over the surface, thereby softening the paraffin for an instant and allowing the filings to become embedded in it. The direction in which the magnetic needle points whennear a wire carryingan electric currentdepends upon twothings: (1) the sideof the wire on whichit stands and… … MERIDIAN OF K/EARTHS MAGNETISM \ ^J Fro, 45. — Magnetic lines of force which surround an electric current shown by small compassneedles, N§. ELECTROMAGNETISM 91 Direction of . Magnetic ^^>
Electricity · Magnetism
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