A manual of electricity, magnetism and meteorology (1844)
Lardner, Dionysius, 1793-1859, Walker, Charles Vincent, 1812-1882 · London Longman, Brown, Green & Longmans · leaf 481
angle, so as just todip into the mercury contained inthe cistern. Another wire is attached to the lower endof the magnet, dipping in like manner into the mer-cury in the lower cistern. When the cups are putin communication with a voltaic apparatus, the lowerhalf of the magnet only is traversed by… … CHAP. II. ROTATING DISC. 445
Atmospheric electricity · Electricity -- Early works to 1850 · Magnetism
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