A manual of electricity, magnetism and meteorology (1844)
Lardner, Dionysius, 1793-1859, Walker, Charles Vincent, 1812-1882 · London Longman, Brown, Green & Longmans · leaf 507
epresented in Fig. 236. fig. 217. The current is sup-plied by a single pair of zincand copper plates, as in thelatter apparatus. (475.) In both these ar-rangements the helical cur-rent is made to play the partof an azimuth compassneedle. I propose the fol-lowing arrangement to sub-mit it to the… … CHAP. IV. ELECTRO-DYNAMIC RECTANGLE. 471 of the axis, let them merely project laterally from itssides, forming a right angle with the direction of theaxis, and let them be supported in horizontal bearingslike the axis of the dipping-needle. By this means theelectro-dynamic helix will be capable of…
Atmospheric electricity · Electricity -- Early works to 1850 · Magnetism
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