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PAGE PREFACE TO SECOND EDITION v
PREFACE vii
INTRODUCTORY 1
Foreword--Early experiments--Advantages of Radio-Photography--Difficulties in Cable working--Bernochi's System--Knudsen's System.
TRANSMITTING APPARATUS 13
Wireless Apparatus--Preparing the Photographs--Transmitting Machines--Transmitting Apparatus--Effects of Arcing--Spark-Gaps--Contact Breakers--Complete Station--Professor Korn's Apparatus--Poulsen Company's Photographic Recorder--Comparison of various systems--Practical applications.
RECEIVING APPARATUS 37
Methods of Receiving--Author's Photographic Receiver--Decohering Apparatus--Description of Einthoven Galvanometer--Use of Galvanometer in Receiving--Belin's Application of Blondel's Oscillograph--Description of Charbonelle's Receiver--Use of Telephone Relay--Description of Telephone Relay--Telephotographic Receiver--Polarisation Receiver--Kathode-Ray Receiver--Electrolytic Receiver--Atmospherics in Long-Distance working.
SYNCHRONISING AND DRIVING 63
Driving Motors--Isochronising the Electrolytic System--Professor Korn's method--Description of Hughes Governor--Author's Speed Regulator--Problem of Synchronising--Methods of Synchronising--Advances made in Radio-Photography.
THE "TELEPHOGRAPH" 74
Author's System of Radio-Photography--Requirements--Advantages--Transmitting machine--Description of Differential Relay--Wireless Receiving Apparatus--Photo-Telegraphic Receiving Apparatus--Circuit Breaker--Friction Brake--Magnetic Clutch--Description of Isochroniser--Method of working--Types of Nernst Lamp--Action of Nernst Lamp--Comparison of Actinic Value--Inertia of Photographic Films--Choosing Films--Speed of Films--Standard of Speed--Comparative Film Speeds--Effects of Minimum Exposure--Effects of Maximum Exposure--Considerations in working and choosing Films.
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