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 245
Fig. 61. Reflecting galvanometer. Z, lamp; N, moving spot of light reflected from mirror. On the same plan, the extremely minute motion of a gal-vanometer, as it receives the successive pulsations of amessage, is magnified by a weightless lever of light so that 2o6 CABLE TELEGRAPHY … Fig. 62.Siphon recorder. the words are easily read by an operator (Fig. 61). Thisbeautiful invention comes from the hands of Sir WilliamThomson, who, more thanany other electrician, has made ocean telegraphy an establishedsuccess. In another receiver, also ofhis design, the siphon recorder,he began…
Fire · Electricity · Color photography
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