Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 51
and itsextren°ity describes the curve in the figure, upon which the appropriatetimes of day may be indicated, and the vector representing anyrequired time may be seen. It is then found that for all points onthe earth having the same latitude, the vector diagram of dailyvariation has the same shape,… … Fig. 34. zontal component of the earths field at that point, to obtain the actualhorizontal component and the direction in which the compass would set. The daily variation is less in winter than in summer. (iv) Mcu/neiic Storms.—Simultaneous variations in the magneticelements over the whole earth…
Electricity · Magnetism
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