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 744
ne, d., whichis fixed, is divided on the edge into360°, while on the other, e, which ismo^•able, there is a mark, l\ to in-dicate its rotation. D and E re-present the two pieces of the torsionhead on a larger scale. On E thereare two uprights connected by ahorizontal axis, on which is a veryfine… … Fig. 6go is at zero of the scale D, the case is so arranged that the wire supportingthe needle and the zero of the scale in the case are in the magnetic meridian.The needle is then removed from its stirrup, and replaced by an exactlysimilar one of copper, or any non-magnetic substance ; the tube,…
Physics
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