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CONTENTS. Pago Introductory .. .. .. .. .. .. .. .. .. .. ..3 Telephony s Automatic and Manual .. .. .. .. .. .. .. ..4 Statistical .. .. .. .. .. .. .. .. . . . . .. 4 Rival Systems .. .. .. .. .. .. .. .. .. .. .. 4 Types of Automatic Telephone Exchanges Equipment .. .. .. .. .. .. .. 4 Telephone-manufacture in the United Kingdom .. .. . . . . .. . . . . 4 London Automatic Exchange Network .. . . .. . . . . .. .. .. 6 Automatic Exchanges visited and compared .. .. .. . . . . . . .. 5 Cutover Procedure .. .. .. .. .. .. .. . . . . .. 5 Application of Automatic-switching Methods to the Smaller Telephone Communities .. .. ..8 Modernized Manual-exchange Equipment .. .. .. .. .. .. .. ..6 Automatic versus Manual .. .. .. .. .. .. .. .. . . .. (i Intercommunication between Adjacent Exchanges .. .. .. .. .. .. . . (i Provision for Growth of Telephone Systems .. .. .. .. .. . . . . (i Prospective Telephone Exchange Installations . . .. . . .. . . . . . . 7 Power Plant: Machines .. .. .. .. .. . . . . .. . . .. 7 Power Plant: Dry Batteries .. .. .. .. .. .. . . . . .. 7 Power Plant : Storage Batteries .. .. .. . . .. .. .. .. .. 7 Air-conditioning Plant .. .. .. .. .. .. .. .. .. .. 7 Fire Precautions .. .. .. .. .. .. .. .. .. .. .. 8 Auxiliary Telephone Apparatus : P.B.X. and Interphone ; Telephone Pay Stations . . .. .. S Toll Operating Methods .. .. .. .. . . .. .. .. .. .. 8 Auxiliary Telephone Services : Information, Time, &c, and the Relation of Broadcasting thereto .. . . 9 Standards of Transmission .. .. .. .. .. .. .. . . .. 9 Observation and Traffic Studies .. .. .. .. .. .. .. . . .. 9 Rates and Quality of Service .. .. .. .. .. .. .. . . ■ . 9 Ticlkgraphs .. .. .. .. .. .. .. .. .. .. ..10 Machine Printing (General) .. .. .. ... .. .. .. .. .. 10" Multiplex .. .. .. .. .. .. .. .. .. .. .. ](l Si mplex or Teletype .. .. .. .. .. .. . . .. .. 10 Commercial and Traffic Aspects of Telegraphy .. .. .. .. .. .. ..10 Telegraph Offices visited .. .. .. .. .. .. .. .. .. ..11 Radio-telegraphs and Telephones .. .. .. .. .. .. .. .. ..II General .. .. .. .. .. .. .. . . .. . . ..11 International Radio-telegraph Conference, 1927 .. .. . . .. . . .. ..II Deacon and Direction-finding Stations .. .. .. .. .. .. .. ..II Marine Radio Installations .. .. .. .. .. .. .. .. ..II International Radio-telegraph Communication in relation to New Zealand .. .. .. . . \2 Trans-oceanic Speech .. .. .. .. .. .. .. .. .. ..12 Broadcasting : Statistical .. .. .. .. .. .. .. .. .. .. \2 British and American Broadcasting in relation to New Zealand .. .. .. .. ..18 Broadcasting: General .. .. .. .. .. .. .. .. . . 1 :i Departmental Responsibility to Broadcast Listeners in connection with Interference .. .. 13 Quality of Broadcast Reception .. .. .. .. .. .. . . .. 14 Absorption and Distortion .. .. .. . . . . .. .. .. ..14 Fading of Broadcasting-stations .. .. .. .-. .. .. .. .. ..It Carrier Current .. .. .. .. .. .. .. .. .. .. ..14 Application to Telegraph and Telephone Lines .. .. .. .. .. .. ..II Power-line Carrier Current .. .. ■ . • . .. .. .. . . 15 Voice-frequency Telegraphs .. .. . . .. .. .. .. .. 15 Field Engineering .. .. .. .. .. .. .. .. .. .. 15 Scope of Inquiries .. .. .. .. .. .. .. .. .. 15 Telegraph and Inter-urban Telephone lines .. .. .. .. .. .. .. . . l(i Subscribers'Distribution .. .. .. .. .. .. .. .. .. .. lfi General .. .. .. .. .. .. .. .. .. . . 16 Protkction of Teleqraimi and Telephone Plant from Electric Poweb and Lightning .. ..17 Buildings .. .. .. .. .. .. .. .. .. .. ..18 Organization .. .. .. .. .. .. .. .. .. .. ..18 Causes contributing towards Variations in Telephone Density .. .. .. .. .. ..18 Research Work .. .. .. .. .. .. .. .. .. .. ..19 Staff Training : Engineering and Technical .. .. .. .. .. .. .. ..19 Specialization .. .. .. .. .. .. .. .. . . .. 19 Understudies .. .. .. .. .. .. .. .. .. .. ..19 Engineering Conferences .. .. .. .. . . .. .. .. .. 19 Decentralization .. .. .. .. .. .. .. .. .. .. 20 Staff Conditions .. .. .. .. .. .. . . . . .. .. . . 20 Recruiting of Telegraph and Telephone Engineers and Technicians . . . . . . . . ... 20 Standardization .. .. .. .. .. . . .. .. .. .. 20 Laboratory .. .. .. .. .. .. .. .. .. .. .. 21 Plant Accounting .. .. .. .. .. .. .. .. .. .. ..21 Conclusion .. .. .. .. .. .. .. .. .. .. .. 21