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 237
e spirally wound, followed by a strong outer covering. For the greatest depths at sea, type A is employed for a total length of 1420 miles; the diameter of this part of the cable is seven-eighths of an inch. As the water lessens in depth the sheathing increases . in size until the diameter of the… … Fig. 59..Commercial cable, 1894. miles, where type C has a diameter of 2\ inches. Theweights of material used in this cable are : copper wire, 495tons; gutta-percha, 315 tons; jute yarn, 575 tons; steelwire, 3000 tons; compound and tar, 1075 tons; total, 5460tons. The telegraph-ship Faraday,…
Fire · Electricity · Color photography
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