Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 187
position of the south magneticpole is not known. In the case of the declination as we pass to the west fromEngland across the Atlantic the westerly declination increasesand then decreases again gradually until we come to near thelongitude of Lake Superior when we cross a line along whichthe… … a. 8. Fig. 116. 12 178 MAGNETISM [CH. XII east from England the westerly declination decreases, becomina;zero along an agonic line which traverses Russia fromSt Petersburg to Sebastopol, and then passes down theArabian Gulf to the west of India. To the east of this linethe declination is easterly.…
Electricity · Magnetism
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