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 276
y be made wholesalefor a dollar; yet in their simplicity of construction, unitedto complexity <>f working, they arc among tin- most re-markable- creations of the age. Fig. ~,i 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, IV, W. The electricundulations arrive at a…
Technology · Fire · Electricity · Photography
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