21

F.—1.

Table No. 25. Insulation Tests of the First and Second Cook Strait Cables for the Year ended 31st March, 1882, showing the Resistance per Knot after Two Minutes' Electrification in Megohms (British Association Units of Resistance).

Table No. 26. Insulation Tests of the Wanganui and Wakapuaka Cable for the Year ended 31st March, 1882, 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. I Wire. No. 2 Wire. No. 3 Wire. Second Cook Strait Cable. Dielectric Resistance pel Knot. 881— 1881 — April 150 258 314 April 1,554 May 152 263 305 May 1,469 June 142 25S 296 June 1,23' July 148 259 299 July 1,369 August '50 270 320 August i,536 September 163 265 308 September ■,389 October '55 263 291 October 1,320 November 156 282 345 November 1,556 December '59 288 300 December 1,172 882— 1882— January 136 245 309 January 1,238 February Broke 19th February February 1,163 March March 1,142

Date. Dielectric Resistance per Knot. Copper Resistance per Knot in Ohms. Mean Temperature of Sea-bottom calculated from the Observed C.R. i88i — Twenty Cells. Deg. F. April 3,581 II 04 61 May 3,954 11-04 61 June 4,292 11-04 61 July 4,i55 11 04 61 August 4 849 1099 54'5 September 5,827 10-97 5775 October 5,"o 1099 58-5 November 4,688 1099 58-S December 4,404 11-04 61 882— January 4,705 n-oi 59'5 February 4,i73 HOI 59'S March 3,688 II-Q2 60