Submarine cable laying and repairing

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116 SUBMARINE CABLE LAYING AND REPAIRING. jockey pulley on a lever, with counterweight, presses down on the cable, giving it adhesion to the sheave, and so drawing it in. Two, and sometimes three, lines of cables are drawn on board and coiled in tank at the same time. A high rate of 68 miles per day of 12 hours was attained in the shipment of the South American cable on board the " Silvertown."
THE LAYING OP SUBMARINE CABLES. 117 Usually about 1,000 miles can be transferred from factory to ship in 15 working days without working at night, and including stoppages for splicing. The coiling in tank is carried out as shown in the illustration (Fig. 55), which is a reproduction of an old and interesting print from the Illustrated London Neios, representing the coiling on board the " Great Eastern " of the '65 Atlantic cable^ A number of men take positions round the tank, and as the cable passes them, guided by one man running round, place it close to the previous turn. The coiling is started round the sides of the tank, and continued inwards towards the centre, and when one layer or flake is completed up to the cone, the end is taken across to the side of the tank again, and another flake started and coiled inwards. To prevent the whole weight of the upper flakes bearing on che connecting portions that run across, tapered strips of wood are laid parallel to them on either side. This is known as the " feather-edge " in coiling. - A considerable number of the necessary splices between different sections and types are made at the factory during shipment, but these, of course, are only made between sections that will be paid out together, other splices being left for the ship to make when laying. It is usual to whitewash the cable all over as a precaution against the turns in tank sticking together. It is not to ba imagined that the whole of the tanks on board are ever completely filled with cable. Ships with four tanks could, as far as the amount of cable carried at one time is con- but the stowage of cable cerned, generally dispense with two ; has to be regulated with regard to the trimming of the ship, and hence the total dead weight of cable is divided fairly evenly between the various tanks. While cable is being coiled on board ship from the manufactory or from reserve tanks on shore, the draught of water at the bows and stern is carefully watched, with the view of keeping the vessel in good trim. If too much is put into the aft tanks, and she is down by the stern, it will not be easy to keep the vessel on her course under a beam wind or tide, the fore part of the ship beiug light. Any want of trim in coiling is afterwards corrected by filling the necessary water- ballast tanks. The cable tanks are usually not more than one- half or two-thirds full, the capacity of some ships being such
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%f h ZU Institution of €kctrical
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Printed and Published by 'THE ELECT
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iv. PREFACE. past, 1 think there wi
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PREFACE TO SECOND EDITION. THIS wor
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appeared. Mr. Charles Bright, F.R.S
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Selection of Route Soundings Tubes
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CHAPTER IV. — TABLE OF CONTENTS.
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INDEX TO ILLUSTRATIONS. Bows ANB Bo
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INDEX TO ILLUSTBATIONS. XVll. Dynam
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MiEROE. — Continued. Rymer-Jones'
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Sounding. INDEX TO ILLUSTEATIONS. J
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Tests and Testing.—Continued. IND
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Z SUBMARINE CABLE LAYING AND REPAIR
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4 SUBMAKINE CABLE LAYING AND BBPAIE
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THE LAYING OF SUBMAKINE CABLES. 165
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THE LAYING OF SUBMARINE CABLES. 167
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THE LAYING OF SUBMAEINE CABLES. 175
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THE LAYING OF SUBBIAKINE CABLES. 17
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CHAPTER IV. THE CABLE SHIP ON REPAI
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THE CABLE SHIP ON REPAIRS. 185 in t
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THE CABLE SHIP ON REPAIRS. 187 and
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THE CABLE SHIP ON REPAIRS. 189 and
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THE CABLE SHIP ON REPAIRS. 191 ment
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THE CABLE SHIP ON REPAIRS. 193 ing
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THE CABLE SHIP ON RErAIRS. 195 abou
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THE CABLE SHIP ON REPAIRS. 197 hund
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THE CABLE Sllir ON REPAIRS. 199 upw
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THE CABLE SHir OX REPAIRS. 201 the
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THE CABLE SHIP ON REPAIRS. 203 to-d
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THE CABLE SHIP OX REPAIRS. 205 pron
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THE CAHLE SHIP OX REPAIRS. 207 by l
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THE CABLE SHIP OX REPAIRS. ^ 209 10
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THE CABLE SHIP ON REPAIRS. 211 come
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THE CABLE SHIP ON REPAIRS. 2ia chai
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THE CABLE SHIP ON REPAIRS. 215 In t
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THE CABLE SHIP OX REPAIES. 217 show
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THE CABLE SHIP ON REPAIRS. 219 Cabl
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THE CABLE SHIP ON REPAIRS. 221 to t
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THE CABLE SHIP OX REPAIES. - 223 sh
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THE CABLE SHIP OX REPAIRS. 225 a bl
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THE CABLE SHIP ON BEPAIES. 227 the
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THE CABLE SHIP ON REPAIRS. 22& tota
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THE CABLE SHIP ON REPAIRS. 231 Stea
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THE CABLE SHIP ON REPAIRS. 235 dist
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THE CABLE SHIP ON REPAIRS. 237 la t
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THE CABLE SHIP ON KEPAIRS. 239 spac
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THE CABLE SHiP ON REPAIKS. 241 very
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THE CABLE SHIP ON REPAIRS. 243 unde
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THE CABLE SHIP ON REPAIRS. 245 noti
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THE CABLE SHIP ON EEPAIES. ~ 247 be
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THE CABLE SHIP ON REPAIRS. 251 H.M.
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THE CABLE SBIP ON REPAIKS. 253 Befo
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THE CABLE SHIP ON REPAIES. 255 medi
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THE CABLE SHIP ON EEPAIES. 257 o o
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THE CABLE SHIP ON REPAIRS. 259 In t
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THE CABLE SHIP ON EEPAIES. 261
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THE CABLE SHIP ON KEPAIRS. 263 intr
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THE CABLE SHIP ON REPAIKS. 2G5
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THE CABLE SHIP ON REPAIBS. 267 test
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THE CABLE SHIP ON EEPAIKS. 269 When
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THE CABLE SHIP ON KEPAIRS. 271 with
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THE CABLE SHIP ON REPAIRS. 273 silv
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THE CABLE SHIP ON REPAIRS. 275 ing
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THE CABLE SHIP ON KSIPAIES. 277 fin
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THE CABLE SHIP ON BEPAIRS. 279 ever
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THE CABLE SHIP ON KEPAIRS. 281 the
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THE CABLE SHIP ON REPAIRS. 283 of p
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THE CABLE SHIP ON EEPAIES. 281 The
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THE CABLE SHIP ON REPAIRS. 287 rope
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THE CABLE SHIP ON REPAIKS. 289 at t
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THE CABLE SHIP ON EEPAIES. 291 appe
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THE CABLE SHIP ON REPAIRS, 293 Thes
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THE CABLE SHIP ON EEPAIES. 295 whic
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THE CABLE SHIP ON REPAIRS. 297 The
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THE CABLE SHIP ON REPAIRS. 299 minu
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THE CABLE SHIP ON REPAIRS. 301 for
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THE CABLE SHIP ON EEPAIES. 303 like
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THE CABLE SHIP ON REPAIRS. 305 Mr.
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THE CABLE SHIP ON REPAIRS. mi latte
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THE CABLE SHIP ON EEPATRS. 309 day
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THE CABLE SHIP ON K|;PAIRS. 311 of
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THE CABLE SHIP ON KEPAIRS. 313 pass
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THR CABLE SHIP ON REPAIRS. 315 spli
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CvJ gi £ LU ^ I « CO I < Ql Ul QC
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Anchor, Mushroom, 191 Anderson and
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Galvanometer, Damping by Bridge Arm
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INDEX. Price, W. A., Guard Wire, 50
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Tests, JSr.R.F. Correction in C.R.
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1U0.
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