Flame, electricity and the camera; man's progress from the first kindling of fire to the wireless telegraph and the photography of color (1901)
Iles, George, 1852-1942 · New York, Doubleday & McClure co. · leaf 271
wire, may be made wholesalefor a dollar; yet in their simplicity of construction, unitedto complexity of working, they are among the most re-markable creations of the age. Fig. J J shows the anatomy ITS ANATOMY 233 of such instruments. D is the thin iron disc against whichone speaks as it all but… … Fig. 77.Telephone dissected. magnetism of P to vary in sympathy. Whenever a magnetinclosed in a coil of wire, C, thus varies in strength, minutecurrents,of electricity are created in the coil; such currentsaccordingly pass to the line-wires, W, W. The electricundulations arrive at a…
Fire · Electricity · Color photography
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