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Bible Encyclopedias
Isogonic Lines

1911 Encyclopedia Britannica

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ISOGONIC LINES (Gr. iao^yc.iveos, equiangular), lines connecting those parts of the earth's surface where the magnetic declination is the same in amount (see Terrestrial magnetism).

Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Isogonic Lines'. 1911 Encyclopedia Britanica. https://www.studylight.org/​encyclopedias/​eng/​bri/​i/isogonic-lines.html. 1910.
 
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