A manual of electricity, magnetism and meteorology (1844)
Lardner, Dionysius, 1793-1859, Walker, Charles Vincent, 1812-1882 · London Longman, Brown, Green & Longmans · leaf 511
d attractive and repulsive pro-perties as a bar magnet, the end to which the front ofthe currents is presented being the south pole. The same would be true whatever might be thefigure, a a, bb\ &c, of which the solenoid might beformed. (478.) An instrument of much utility in these inqui-ries is… … Ampere : other and less complex arrangements havebeen introduced ; but all are on the same principle.The lower portion of the figure represents the completeinstrument; the upper, the instrument with the barBB and its appendages removed. If RR. be troughsof mercury, connected with the two ends of a…
Atmospheric electricity · Electricity -- Early works to 1850 · Magnetism
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