U 1 TMAN'S AD I O 'YEAR BOOK 1927 F(11 MAJESTIC VOLUME, LONG LIFE, AND ECONOMY lard i THE MASTER- VALVE WITH THE WONDERFUL P.M. FILAMENT L.. THE STANDARD Type A.R.19 Frise £5 : 5 : 0 Other Amplion Models from 38s. 44aLc444.01x4.1- ikructzt4mwitt &wiz at& Write for latest illustrated lists ANNODNCEMENT OF ALFRED GRAHAM & CO. (M. GRAHAM)I 25 SAVILE RON, LONDON, W.1 (5249) ¶ The World's Greatest Magazine of Wireless wireless Magazine Contains each month a varied Azglection of Published about first -rate articles for Home Constor, the the 25th of each fullest details always being given, together month at helpful diagrams and photographs. Stories and `c articles of gneral interest to the Wireless dnthusiast are contributed by first -class writers. 11 Gives week by week straightforward instructions for making every kind of Wireless Set and latest news of Wireless developments written by experts. Queries answered by post, free ofAharge. Published 3 D . Every See this week's issue. Thursday CASSELL'S, LONDON, E.C.4 Q m..\4\h\y.f\q .O \Y.\v\ -.v : 1¡ \VJ\VJ n j\V . n , \Vli.,nn\V. vav Q St ÿ.. -0, 4 he Jirst Essential t to Perfect Reception, o 3 ROADCASTING brings into your home all that is best in music, P drama, and education. l But to enjoy these to the full, you must use "HART" Batteries on your set for S $ bosh Low and High Tension Supply. " HART " Batteries alone provide that S i steady power to your valves which en- S ables them to reprodu a with maximum 4 power and purity. S S 0 11 0i5 , That is why eminent musicians like De 9 ' '' Groot and many others personally use and recommend them. 9 r o JI k o HA 1 ez T It i ll_ THE BATTERY OF QUALITY S o t There are models of S ..4i..y l "HART " Batteries 1 ' ` for all wireless circuits. S i Write De t. P.Y.B. ß 1 J' / ::".` , for full particulars. 1 ;;, - , p)iii ' Tor 1 )'' - /. ' I i MIS a 1Ì ,; za t f' HART ACCUMULATOR. C° L° STRATFORD. LONDON. E. 11 I/. /.A/ // // /A /A /A'//'IA' //co www.A'/AIA /w %NIw'/w A/AAww, Goodall Ad. t5 THE RADIO YEAR BOOK 1927 (Fifth Year) A BOOK OF REFERENCE FOR ALL INTERESTED IN BROADCAST RECEIVING WITH CONTRIBUTIONS BY J. A. FLEMING, M.A., D.Sc., F.R.S. CAPT. P. P. ECKERSLEY LIEUT. -COL. CRAWLEY, M I.E.E. JAMES SWINBURNE, F.R.S. J. F. CORRIGAN, M.SC., A.I.C. NORMAN EDWARDS JOHN L. BAIRD AND MANY OTHER DISTINGUISHED RADIO -ENGINEER" AND SCIENTISTS WITH MANY ILLUSTRATIONS LONDON SIR ISAAC PITMAN & SONS, LTD. PARKER STREET, KINGSWAY, W.C.2 BATH. MELBOURNE, TORONTO, NEW YORK 1927 THE BEST AMPLIFIER and the CHEAPEST both to fix and operate THE NEW NON -VALVE MAGNETIC MICROPHONE BAR AMPL)IFIER Complete Microphone and other Amplifier parts of PRICE Amplifier also supplied 38f- separately Post Free Illustrated lists Dry Cells Extra free REALLY( GOOD LOUD -SPEAKER RESULTS from CRYSTAL RECEPTION of average strength. WEAK CRYSTAL or VALVE RECEPTION made STRONG AND CLEAR IN HEADPHONES. ENABLES even very DEAF PERSONS TO HEAR from CRYSTAL SETS. Not a Microphone Button. Entirely free from distortion and microphonic noises. No valves, accumulators, or H.T. Batteries. No fragile parts. Nothing to get out of order. A child can adjust it. Operates on one or two Dry Cells lasting over 3 months. EQUALLY EFFICIENT ON VALVE SETS. Order from your dealer or from Sole Manufacturers and Patentees : NEW WILSON ELECTRICAL MANUFACTURING CO., LTD. 18 Fitzroy Street, Euston Road, London, W.1 'Phone: Museum 8974 PREFACE TO THE 1927 EDITION As foreshadowed in the Preface to the 1926 Edition of the YEAR Boox, the British Broadcasting Company has now been taken over by the Government and will in future be administered by, a body known as the British Broadcasting Corporation. We are glad to learn that the Executive will remain substantially as before -because we believe that the staff which has built up the broadcasting service to its present high standard is the one best fitted to maintain and improve the service. Two events stand out in what might be called the Radio History of 1926- (1) The fine work done by the Wireless for Hospitals' Fund which was started by the Daily News in 1925, and through the medium of which nearly 40,000 beds in London hospitals have been provided with headphones to enable patients to listen to the broadcasting during their tedious hours of suffering or convalescence. (2) The successful demonstration by Mr. J. L. Baird of tele- vision, or seeing by wireless, as distinct from the wireless trans- mission of photographs or of shadowgraphs. Whether apparatus which will enable listeners to see the artists whilst they are broad- casting will be obtainable within twelve months remains to be seen, but we have the inventor's word that this is highly probable. (3) As regards commercial wireless, the completion of Rugby and the beam stations for direct communication between this country, Canada, Australia, South Africa and India make the year 1926 one of notable progress. Mr. James Swinburne, F.R.S., in an article entitled " A Pessi- mistic View of Broadcasting," gives some really original views on the subject. We leave our readers to judge how far Mr. Swinburne intends these views to be taken seriously. Our thanks are due to many correspondents and certain re- viewers for helpful criticisms and suggestions. THE EDITOR. v TELEVdSION SEEING BY WIRELESS By ALFRED DINSDALE, A.M.I.R.E. The first book dealing exclusively with this subject CONTENTS CHAPTER I INTRODUCTION. CHAPTER II WHAT TELEVISION IS -THE HUMAN TELEVISION SYS- TEM -THE SELENIUM CELL -THE EXPERIMENTS OF RIGNOUX AND FOURNIER AND RHUMER. CHAPTER III VARIOUS ATTEMPTS TO SOLVE THE PROBLEM : SZCZE- PANIK, ROSING, MIHALY. CHAPTER IV THE PHOTO ELECTRIC CELL. CHAPTER V THE PRESENT STATE OF THE ART-THE EXPERIMENTS OF MM. BELIN AND HOLWECK AND MESSRS. JENKINS AND MOORE. CHAPTER VI THE BAIRD " TELEVISOR " -THE PROBLEM SOLVED- TRUE TELEVISION DEMONSTRATED AT LAST. CHAPTER VII 2 T.V., THE WORLD'S FIRST TELEVISION BROADCASTING STATION-DEVELOPMENT OF TELEVISION A ONE - MAN JOB. Price 2s. net. Of all Booksellers, or direct from SIR ISAAC PITMAN & SONS, LTD. PARKER ST., KINGSWAY, LONDON, W.C.2 CONTENTS PAGE PREFACE V GENERAL SECTION THE BRITISH BROADCASTING CORPORATION 3 AIMS AND ACHIEVEMENTS OF THE B.B.C. 5 Land Lines Reorganized- League of Nations Broadcasts -Music Control- Great. Musical Events -Broadcasts from Theatres -Croy- land Abbey Bells -The New Birmingham Studio -Oxford's Broad- casting Studio -Broadcast from American Liner -The King and Changing the Guard -Daventry's Aerial -Help for Mariners - Cinema Broadcasts -Development of Radio Drama -Training of Broadcast Artists -Mass Telepathy Experiment -Chaliapine at the Microphone-Broadcasting During the Labour Crisis- Listening to the Nightingale -Derby Noises -Dual Transmission Experiments - Committee on Pronunciation- Wedding March on Loud Speakers - Cobham's Arrival Home-Westminster Abbey Transmissions -New Wavelength Scheme RADIO HISTORY OF 1926 IN PICTURES ADMIRAL OF THE FLEET, EARL BEATTY, WHO BROADCAST FROM 2L0. .. 6 MR. PLUM WARNER BEFORE THE MICROPHONE 6 MR. WILKIE BARD AT 2L0 . 8 MISS Jost COLLINS AT 2L0 . 8 MISS MARGARET BANNERMAN BROADCASTING FROM THE GLOBE THEATRE . 10 MR. LESLIE HENSON " LISTENING IN " AT THE WINTER GARDEN THEATRE . 10 SIR HARRY LAUDER AT 2L0 . 12 PLACING THE MICROPHONE BY THE LIONS' CAGE AT THE ZOO 14 DESCENDING A PIT SHAFT BEFORE BROADCASTING FROM THE WORKINGS . 15 MESSRS. LAYTON AND JOHNSTONE AT 2LO . 16 MAJOR SEAGRAVE BROADCASTING ON THE WORLD'S MOTOR RECORD. 16 MR. AUGUSTUS JOHN, WHO MADE AN APPEAL FROM 2LO . 18 BROADCASTING " TRIAL BY JURY " . 20 RINGING Bow BELLS . 20 PLACING THE MICROPHONE ON THE ROOF OF Bow CHURCH 21 DR. SALEEBY DELIVERING ONE OF HIS HEALTH TALKS . 22 MR. JAMES AGATE, WHO BROADCASTS TALKS ON THE DRAMA 23 INSTALLING ONE OF THE MICROPHONES IN CANTERBURY CATHEDRAL . 24 PROFESSOR W. H. ECCLES, D.Sc., F.R.S., M.I.E.E. 26 vii CONTENTS PAGE BROADCASTING THE CHANGING OF THE GUARD . 26 THE DIVER ABOUT TO DESCEND BEFORE BROADCASTING FROM UNDER THB: THAMES . 28 MR. STEVE DONOGHUE BROADCASTING FROM 2L0 . 30 SIR ALAN COBHAM BROADCASTING FROM 2L0 . 31 BROADCASTING FROM THE Zoo AQUARIUM . 31 MR. VIVIAN FOSTER, THE " VICAR OF MIRTH " . 33 BROADCASTING AN EXPERIMENT IN MASS TELEPATHY . 34 MR. HEATH ROBINSON, THE FAMOUS HUMOROUS ARTIST 34 B.B.C. WIRELESS ENGINEERING DURING 1926, BY CAPT. P. P. ECRERSLEY . 36 THE WIRELESS AUNTS AND UNCLES . 40 London - Liverpool - Cardiff - Nottingham - Manchester - Leeds Bradford Birmingham - Bournemouth - Dundee - Aberdeen- - A PESSIMISTIC VIEW OF BROADCASTING, BY J. SWINBURNE, F.R.S. 47 TELEVISION, BY JOHN L. BAIRD . 50 HOW TO BUY A WIRELESS SET, BY " MENTOR " . 56 WOMEN AND WIRELESS, BY " MRS. MENTOR." . 60 WIRELESS IN THE HOSPITALS . 64 PAST AND FUTURE, BY " MENTOR " . 79 LIST OF STATIONS OF SPECIAL INTEREST TO LISTENERS 85 PERIODICAL LITERATURE 87 THE WIRELESS LEAGUE 90 TECHNICAL SECTION INSULATION AND INSULATING MATERIALS, BY J. A. FLEMING, M.A., D.Sc., F.R.S. 98 AMATEUR RADIO IN 1926, BY THE EDITOR OF " POPULAR WIRELESS " . 102 " WHEREVER SHE GOES," BY " MENTOR " . 109 THE PROBLEM OF THE OSCILLATING CRYSTAL, BY J. F. CORRIGAN, M.SC., A.I.C. 113 RADIO AND CABLES, BY LT. -COL. CHETWODE CRAWLEY, M.I.E.E. 118 RECENT DEVELOPMENTS IN WIRELESS . 125 ROUND THE FACTORIES, BY " MENTOR " 131 LIST OF RADIO SOCIETIES 148 COMMERCIAL SECTION RADE DIRECTORY . 156 GENERAL SECTION THE BROADCASTING CORPORATION AIMS AND ACHIEVEMENTS OF THE B.B.C.