Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 331
e positions of the object andthe magnetic meridian lie on the same side of the geographicalmeridian. 242. Dip Circle.—For the determination of magnetic dip, aneedle that can turn about a horizontal axis, therefore moving in avertical plane, is used : a needle thus arranged moves only underthe… … Fig. 200. a resultant ^1= V^2 + ^2cos2a. This makes with the horizontal an angle i given by the equation H cos a cot i = cot / cos a. 308 TERRESTRIAL MAGNETISM [242- This direction i is that which the needle will take ; it may becalled the apparent dij[> in the azimuth a. For a = 0 we have i =…
Electricity · Magnetism
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