The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 56
adjacent to either magnetic pole. Hence thedeclination at any point could be calculated from thelatitude and longitude if the position of the agonic linewere known. But observation shows that this hypothesis is onlyapproximately true, and that the distribution of mag-netic force on the earths… … Fig. 19.—Southern Hemisphere. 40 DYNAMIC ELECTRICITY AND MAGNETISM. Inclination or Dip.—At the magnetic equator the posi-tion of the needle is parallel with the horizon, verticalmagnetic attraction on each of its poles being equal andopposite, but at all points north or south of this line itis…
Electricity · Magnetism
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