!_..—2

12

TABLE F. INSULATION TESTS of the COOK STRAIT CABLE for the Years ended 30th June, 1868, 1869, 1870, 1871, 1872, 1873, 1874, 1875, 1876, 1877, and 1878 respectively, showing the Resistance per knot after Two Minutes' Electrification in Megohms (British Association Units of Resistance).

TABLE G. INSULATION TESTS of SECOND COOK STRAIT CABLE for the Years ended 30th June, 1877 and 1878, showing the Resistance per knot after two Minutes' Electrification in Megohms (British Association Units of Resistance). LENGTH OF CABLE LAID, 44.315 KNOTS.

Date. I No. 1 i Wire. No. 2 Wire. No. 3 Wire. Date. No. 1 Wire. No. 2 W rire. No. 3 Wire. Date. No. 1 Wire. No. 2 Wire. No. 3 Wire. Date. No. 1 Wire. No. 2 Wire. No. 3 Wire. Date. No. 1 Wire. No. 2 Wire. No. 3 Wire. Date. No. 1 Wire. No. 2 Wire. No. 3 Wire. ! ! i I I i i _-—__ ! : ! ' 1867— Sept. 1 Sept. 30 Oct. 14 Nov. 1 Nov. 14 Dec. 2 473 634 547 598 574 608 71 102 179 32-6 10-6 105 554 634 620 667 643 709 1870— Jan. 22 Feb. 22 March 18 March 20 April 26 May 31 June 26 July 36 Aug. 16 Sept, 17 Oct. 20 Nov. 2 f Dec. 21 526 417 442 344 430 456 355 517 473 508 471 505 480 2 3 3-4 3-06 8-6 •446 23 -393 1-7 8-7 5-5 10-2 7-7 865 707 967 619 812 871 622 893 763 1,108 1,069 1,149 1.121 1871— Sept. 25 Oct.f ... Nov. 23 Dec. 28 517 641 570 1-31 2-65 998 1,123 1,481 1,079 1873— May 23 June 23 July 24 Aug. 23 Sept, 23 Oct. 21 Nov. 22 Dec. 24 1874— Jan. 24 Feb. 24 March 25 April 24 May 23 June 27 July 24 Aug. 29 Sept. 24 Oct. 26 Nov. 24 Dec. 23 1875— Jan. 23 505 611 628 717 609 569 695 554 29-7 500 613 68-3 57-2 182-1 3475 389-5 1,231 1,203 1.159 1,564 1,193 1,214 1,429 1,312 1875— Feb. 23 March 24 April 23 May 22 June 24 July 24 Aug. 24 Sept, 24 Oct. 23 Nov. 24 Dec. J ... 764 719 636 712 562 749 679 812 692 622 44 30-4 37-6 41-7 41-9 2051,274 1,277 1,139 1,274 1,064 1,453 1,251 1,781 1,264 1,391 1876— Oct, 24 Nov. 24 Dee. 23 1877— Jan. 24 Feb. 24 March 24 April 24 May 24 June 23 July 24 Aug. 24 Sept. 24 Oct. 24 Nov. 24 Dec. 24 1878— Jan. 24 Feb. 23 March 23 April 24 May 24 June 24 575 620 370 3-095 T51 •357 843 786 460 1SGS— .Tune 7* Sept, 11 Sept. 17 930 630 697 5-5 22-5 635 1,094 946 1,000 1872— Jan. 27 Feb. 27 March 31 April 25 May 28 June 22 July 23 Aug. 19 Septf ... Oct. 22 Nov. 20 Dec. 30 579 596 676 553 649 687 826 818 8-29 9-5 18-5 39-1 44-4 49-6 65-6 88-5 981 1,073 938 979 1,173 1,146 1,476 1,735 592 551 559 579 551 607 682 771 643 944 849 650 314-3 280-7 371-5 356-4 3980 961 75 530 69 28 18 84 1,438 1,217 1,106 1,303 1,115 1,227 1,365 1,564 1,483 1,928 1,882 1,C60 313 347 584 379 363 396 453 435 460 464 436 408 •130 ■365 ■826 •313 •222 ■211 •258 •280 •338 •294 •374 •182 360 418 717 545 386 432 501 474 464 452 423 403 1869— March 27 April 19 May 11 May 17 June 22 ■ July 27 Aug. 24 Sept. 27 Oct.f ... Nov. 8 Dec. 3 467 483 562 531 ■ 522 649 667 754 26 30 31 14 15 9 7 13 729 748 950 963 931 1,104 1,200 1,275 1871 — Jan. 21 Feb. 21 March 23 April 24 May 23 June 24 Juljf ... Aug. 25 574 565 497 508 489 717 67 2-0 2-39 1-85 2-08 1-28 1,312 1,173 1,166 1.003 955 1,288 709 763 867 173 208 220 1,331 1,156 1,561 J 1876— Jan. 30 Feb. 24 March 24 April 24 May 11 May 24 June 26 July 24 Aug. 24 Sept, 25 291 I 407 445 355 308 407 333 398 354 380 •649 2-886 •623 •154 ■385 •736 •199 •178 T66 •274 584 680 715 436 379 524 416 493 490 475 578 365 411 377 402 410 •774 •442 ■502 ■273 •231 •470 634 368 419 387 423 414 | 582 ; 638 "5 2-5 1,253 1,159 1873— Jan. 24 Feb. 24 March 25 .April 23 642 578 611 585 10-3 18-1 24-8 21-0 1.307 1,271 1,420 1,272 751 1-36 1,444 883 94 1,695 * This test was taken with zinc to earth; all the others with copper to earth. t No tests taken. J Cable broken.

Dielectric Resisl :ance per Knot. Copper Resistance per Knot in Ohms. Inductive Capacity per Knot in Microfarads. Date. Remarks. Rive Cells. Fifty Cells. March 12, 1877 24 „ April 24 „ May 24 „ June 23 „ July 24 „ August 24 ,, September 24 ,, October 24 November 24 „ December 24 „ January 24, 1878 February 23 „ March ' 23 „ April 24 „ May 24 „ June 24 „ 3,34,1 4,000 2,6S9 3,134 2,613 3,964 3,014 2,545 2,085 3,227 2,096 2,396 2,323 2,052 1,992 2,870 2,141 2,857 2,347 2,674 2,833 2,538 2,834 2,813 2,358 2,251 2,126 1,887 1,897 1,727 1,777 1,777 11-5085 •3385 ■3351 First test taken immediately after laying.