Flame, electricity and the camera; man's progress from the first kindling of fire to the wireless telegraph and the photography of color (1900)
Iles, George, 1852-1942 · New York, Doubleday & McClure co. · leaf 134
by a wire, NS, convey-ing a current (Fig. 28).Ampere, in a series ofconclusive experiments,further explored the re-lations between magnet-ism and electricity. Heshowed that wires bear-ing currents attract orrepel each other just asmagnets do. His mosttelling demonstration wasthe poising of a coil… … Fig. 28.Orsteds experiment. io4 THE PRODUCTION OF ELECTRICITY repelled a steel magnet precisely as if it were a magnetitself (Fig- 29). The inference was clear—a steel magnet may be considered as a coil,or spiral, affected by elec-tricity in rotation. One contrast, however,was evident from the…
Technology · Fire · Electricity · Photography
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