Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 768
The lines connecting places of equal total force are called isodynamiclines. They are not parallel to the magnetic equator, but seem to haveabout the same direction as the isothermal lines. According to Kuppfer,the force appears to diminish as the height of the place is greater ; aneedle which made… … -736] Determination of Horizontal Force 743 doubt as to the accuracy of these observations, owing to uncertainty as tothe correction for temperature. The intensity varies in the same place with the time of day : it attains itsmaximum between 4 and 5 in the afternoon, and is at its minimum between10…
Physics
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