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CONTENTS—continued. PAGE PAGE Inter-Island Submarine Telephone-cable.. 27 Automatic Telephone Exchanges .. 34 Cross-section of Cook Strait Telephone- Air-conditioning Plants for Automatic cable (Shore End) .. .. .. 28 Exchanges.. .. .. 36 Wireless-equipment Extension, &c. . . 28 Interphone Installations .. .. 36 Wireless Installations on Ships .. 29 Automatic Private Branch Exchanges .. 36 Reception of Signals from British High- Information Bureaux .. .. .. 38 power Station at Rugby .. .. 29 Public Call Offices (Coin-in-slot) .. 38 Imperial Wireless Services .. .. 29 Laboratory .. .. .. 38 Listening Service .. .. .. 30 Aurora Australis .. .. .. 30 (Interleaved is a plan of the Tuatapere new Wireless Communication with Antarctica 30 post-office building ; also illustrations of the Elimination of Interference to " Listeners- new post-office buildings at Eastbourne, Tuatain" .. .. .. ..30 pere, and Paeroa ; sections of the departWireless at Exhibition .. .. 30 mental Court at the Dunedin Exhibition ; a Private Radio-stations and Radio-dealers' section of the switching-apparatus at the Licenses .. .. .. 30 Central Telephone Exchange, Wellington; and Mount Etako Plantation .. .. 30 the laying of the Cook Strait telephone-cable ; Wireless Traffic .. .. 30 together with graphs indicating departmental Radio Broadcasting .. .. .. 30 revenue and expenditure.) Telephone-exchange Service .. .. 31 Extension of Telephone-exchange System 31 Telephone Statistics .. .. 32 APPENDIX. Graph showing the Telephone-exchange Wire in Underground and Aerial Cables, Designation of Offices changed .. .. 39 and Open Aerial Wire, respectively, Cable Business .. .. 39 each Year since 1920 .. .. 34 Radio-telegrams .. .. 39 (For Index to Tables see page iii, and for Detailed Index see pages iv, v, and vi.)

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