The resources and manufacturing industry of Ireland as illustrated by the exhibition of 1853 : being a series of essays on raw materials, machinery, and manufactures of various kinds; to which is appended the official catalogue of the exhibition : a portrait of Mr. Dargan, engraved on steel, with a memoir; and numerous illustrations on wood (1854)
Sproule, John, Exhibition of Art and Art-Industry (1853 : Dublin, Ireland), author, Sproule, John, editor · Dublin : Published by the editor · leaf 304
f soft iron, or other temporarily magnetic metal, and derive its magnetism by induction from the bar which supports it. In applying electric currents to produce motion in needles and other magnetic bodies, the direct attrac¬ tive or repulsive action exerted upon magnetic bodies is applied by coils… … Fig. 12. Illustrations of Dering’s Telegraph. usually been employed. In all cases the coils are placed in such a position that their axes shall be in or parallel to the plane of motion of the magnetic body they are intended to influence. Figs. 6 and 7 represent this arrangement of coils in…
Dargan, William, 1799-1867 · Exhibition of Art and Art-Industry (1853 : Dublin, Ireland) · Industries · Railroad engineering
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