Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 689
t first. Theinclination is now re-determined,and the mean taken of the re- ^...^ ^ ^ suits obtained in the two groups of operations, iii. The plane of the ring may not coincide with the true mag-netic meridian. It should be in that plane when the needle has its minimumdeviation ; an observation of… … 666 On Magnetism. [699- way. It is first allowed to oscillate in the magnetic meridian, and then ina plane at right angles to it. If the number of oscillations m a given timein the first position be 7i, and in the second position «,, then in the first positionthe whole force of the earths magnetism…
Physics
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