13

P.—3

TABLE F. Insulation Tests of the First and Second Cook Strait Cables for the Year ended 31st March, 1881, showing the Resistance per Knot after Two Minutes' Electrification in Megohms (British Association Units of Resistance).

TABLE G. Insulation Tests of the Wanganui and Wakapuaka Cable for the Year ended 31st March, 1881, showing the Resistance per Knot after Ten Minutes' Electrification in Megohms (British Association Units of Resistance). Length of Cable Laid, 108.69 Knots.

First Cook Strait Cable. No. 1 Wire. No. 2 Wire. No. 3 Wire. Second Cook Strait Cable.* Dielectric Resistance per Knot. 880— April 24 May 24 June 24 July 24 August 24 September 24 October 25 November 24 December 24 [881— January 24 February 24 March 24 164 175 189 189 181 165 148 142 141 275 287 3°7 3" 291 263 248 239 259 341 363 371 372 345 323 3" 306 313 1880— April 24 May 24 June 24 July 24 August 24 September 24 October 24 November 24 December 24 1881— January 24 February 24 March 24 Five Cells. 1.568 1,716 1.643 I.765 1,681 1.358 J>393 1,211 1,410 135 i35 129 225 237 221 302 296 277 i,3" 1,200 1,262 * Len; of cabli laid, knots.

Dielectric Resistance per Knot. Copper Resistance per Knot in Ohms. Mean Temperature of Sea-bottom calculated from the Observed C.R. Date. Twenty Cells. 1880— March 2 April 24 May 25 June 24 July 24 August 24 September 24 October 23 November 24 December 23 1881— January 24 February 24 March 24 2.532 2,688 2.7'S 4,187 4,934 5> 6°4 4,920 4,927 4>i94 4.293 11-084 II-II3 11-043 11-017 II I0'95 10-93 I°95 10-99 10-94 Deg. F. 63 64 61 60 S9 57 56 57 59 56 4,490 3,886 3.666 10-99 10-99 II-04 59 59 61