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 230
perimentalline in the English Channel; he proved the possibility ofsignalling for two miles through a wire covered with gutta-percha, and so prepared the way for a venture which joinedthe shores of France and England. In 1850 a cable 25 miles in length was laid from Doverto Calais, only to prove… … Fig. 58.Calais-Dover cable, 1851. four wires, wound spirally so as to combine strength withflexibility; these were covered with gutta-percha and sur-rounded with tarred hemp. As a means of impartingadditional strength, ten iron wires were wound round thehemp—a feature which has been copied in every…
Fire · Electricity · Color photography
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