Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 46
lobe,and cannot be adequately represented upon a plane diagram. East of the American agonic line the declination is westerly, thatis, the compass needle points west of true north ; the isogonals ofwesterly declination are full lines in Fig. 28. The isogonals of easterlydeclination arc clotted lines… … 36 ELECTRICITY AND MAGNETISM chap. a district surrounded by a closed agonic line within which the declin-ation is westerly. This is called the Siberian Oval. Instead of isogonals, the lines which indicate the direction of themagnetic meridian are sometimes i^lottcd. These are called lines…
Electricity · Magnetism
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
