A manual of electricity, magnetism and meteorology (1844)
Lardner, Dionysius, 1793-1859, Walker, Charles Vincent, 1812-1882 · London Longman, Brown, Green & Longmans · leaf 562
etween iron and other metals could be perceived. The power, therefore,of an iron plate to drag a magnet after it, or to intercept magnetic action,should be carefully distinguished from the similar power of such metals assilver, copper, &c. &c, inasmuch as in the iron, far the greater part… … C is a copper plate, so mounted as to admit of revolving upon its axis ; nsare the poles of a powerful horse-shoe magnet, so placed as to admit of therevolution of the plate between them ; w w are conducting wires, one ofwhich is retained in perfect metallic contact with the axis, and the otherwith…
Atmospheric electricity · Electricity -- Early works to 1850 · Magnetism
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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