The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 271
of a horse-shoe ; round this bent bar, wire, covered with silk, isw(.und, forming numerous coils; it is a property o( soft iron to becomepowerfully magnetic when an electric current passes through a coilthus surrounding it. When the horse-shoe bar thus becomes magnetic,it therefore attracts the… … Fig. 2, Perspective view of a Tunnel. 1 i 1
Architecture · Civil engineering · Science
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