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>rj. ■NLWJ.U.N & CO.* LTD.* Lantern Slide Publishers. WIRELESS TELEGRAPHY^OT»/t»w*f. WIRELESS TELf Moris Printer ne Alphabet »«r»jn showing Steady Flow of Energy ~trait of Blgnor Mtroonl, taken at Poldhu 39 Old Semaphore Signalling by hand. Diagram! ihowing methods of working. 40 International Mono Code. G.P.O. Wireless Station, Rugby (Nos. 41-52) (or Maroon! , _ ... 41 General view from top of mast on ono °* ‘he Towers at Poldhn 42 General view of all Malta, sdeja Telegraphy ►tatfon at Poldhn 43 VietTfromRoad £*• w nT" Tor £“ doo i, b 7 E >'° trl0 44 Mast In course of erection. I ’S? t. * Orling-Armitrong Torpedo) 45 Anchor and itaya, Be *' Tho “‘Ue 0 ibl P 46 General view ofpower Th. K«.r at Work g 8£ SSSSOgR ** A Hn j *, er communicating with Squadron by 49 s nij^ ro B V Te'eeraphr 50 Condenser Room. ** ■ 88 OW S “»*Phore Signalling by band. From London 51 Valve Cabinet (open), a to Portsmouth in the days ol Nelson. 52 Tractor and Plough it 46 General view of Power House. 47 Motor Generator Room- 48 Motor Dynamo Room Interior (South East). 49 „ . „ „ ,, • (North East). 50 Condenser Room. 51 Valve Cabinet (open). 52 Tractor and Plough at work laying land wires. For a set of Slides with Reading on "The Construction of Induction Coila" see " Industries,” Section 7 of this Catalogue. pg£.A Ht of Slides taken in an Elentric Generating Station will also be fonnd in Section 7. * SI idea ou Electricity will be found on pages 111, 113, and 119. “ H jfc BYB TELEVISION-ITS HISTORY AND DEVELOPMENTS. following new series of Slices has been arranged by T. Thorne Baber, Esq., F.Inst.P. ! 1 fljt? Brief Typed Notes can be supplied, price 2s. fflgT Plain Slides, 2r. 6d. each. ^ssasr.2SK?ss£,. ,a M MS 1? IS,¥£f/.£S p p1S^ SaW^J&SSo Nawfafetiira wireH frr.m t.~. ... 25 The late* t type of Picture Tdegraph machine. Ssfc,® New* picture wired from Paris to London by Korn’* Selenium Apparatus. 7 Diagram of Method of Synchronising transmitting rV and receiving drums. 'Vr ^8 The Frequency Meter. 9 A R ictur ® transmitted by Korn's Telectrograph ■J»S from Pari* to London. ^'lO Example of Fashion Picture (1908). 11 Rebel Method oi Transmission. ,12 Tschoruer’s Reliei System. , Picture transmitted by Beiin't Telectrograph. 14 Writing in relief transmitted in facsimile bv - Behn's System. i-‘ ,:15 The Code Method. AS 16 Photograph transmitted by the Bart Lane jSV System. FT 17 Diagram of the C as ell Transmitter. 23 Example of bcautifuf work by the Bell System. 24 News Photograph transmitted by the Bell System. 25 Much magnified image showing the formation of the photographically recorded lines which vary in width. 26 Picture (greatly magnified) received by Bell Telephone System. - 27 First photograph telegraphed In natural colours. 28 General scheme of Television. 29 Television image as transmitted by the mosaic method. 30 Image of head and shoulders photographed on the viewing screen of Mihaly's Television Apparatus. , 31 Baird's Scheme of Television. 32 Mr. Francis Jenkins with his Television receiver. " 33 The Belin System of Television. 34 Belin'* Television Receiver. ]&U ELECTRICAL DISCHARGES. Direct Photographs of actual discharges, some of which are from photographs by Lr- - A. A. O. Swinton, Esq. LV . Plain Slide*, 2*. each. J 2r*l n f r7 oscillatory discharge from Induction Coll 11 Same as 10 (nearer view). TT- Mighfrequenoy oi dilatory diaoharge from a leela 12 Pocket Book struck by lightning while in a 5pSo™dl2b™£l?ST I “f“°, l /°“^l 1 1! A ti.l/penn, KlI’Td cu.l.d.1, „.,k.d i ‘ at - k <*-t. ■»* Elootrifled Penny from both p Single Flash Discharge irora large Induction .. figure attachi w»A. T Coll. 1 15 K. J. Tan an Slagle* Flash Discharge Irom large Induction High Frequent Coll, the Spark Gap being within Bare Conduc the Magnetic Field set up by tht Tarrant (Tun Coll Itself. The Spark (ormi a complete helix between the elec- trodes. See alao Lightning Flashes, page 91. Electric Discharges. Simultaneous discharge from both poles, ■ showing characteristic figure attached to each. Photo by Mr. K. J. Tan ant. . V High Frequency Discharge between Two Bare Conductor*. Photo by Mr. &. 1. Tarrant (June, 1905). 4s. 3d,