The American annual cyclopædia and register of important events of the year .. . The present cable has for a conductor a cop-per strand of 7 wires, 6 laid around 1; weight300 lbs. per nautical mile. Embedded for solid-ity in Chattertons compound. The insulatoris 4 layers of gutta-percha, laid on alternatelywith thinner layers of Chattertons compound;weight 400 lbs. per nautical mile. The outercoat is 10 solid wires galvanized, each wire sur-rounded separately with 5 strands of whiteManila yarn, and the whole laid spirally aroundthe core, which had previously been paddedwith a serving of tarred
The American annual cyclopædia and register of important events of the year .. . The present cable has for a conductor a cop-per strand of 7 wires, 6 laid around 1; weight300 lbs. per nautical mile. Embedded for solid-ity in Chattertons compound. The insulatoris 4 layers of gutta-percha, laid on alternatelywith thinner layers of Chattertons compound;weight 400 lbs. per nautical mile. The outercoat is 10 solid wires galvanized, each wire sur-rounded separately with 5 strands of whiteManila yarn, and the whole laid spirally aroundthe core, which had previously been paddedwith a serving of tarred hemp. The breakingstrain is 8 tons, 2 cwt., and it is capable ofbearing its own weight in 12 miles depth ofwater. This length of cable is 2,730 nauticalmiles, part of which is used for completing thecable which parted in 1865. Mr. Willoughby Smith, the inventor of anapparatus for securing continuous tests of theinsulation of the core, had taken the place ofMr. De Sauty as electrician-in-chief; while theservices of Prof. Thomson and Mr. C. F. Var-Vol. vi.—46 ley were, on th
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Keywords: ., bo, bookcentury1800, bookdecade1860, bookidamericanannualcyv6dapp
