1929 1929 Spotlight Tobacco Scientific Inventions and Discoveries
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1 Hydrogen Gas Balloon
2 Tubular Bridge 3 Telescope 4 Finsen Lamp 5 Mono Rail 6 110 Ton Gun 7 Armature 8 Wireless Telegraphy 9 Locomotive Engine 10 Maxim Gun 11 Barometer 12 Standard Compass 13 Phonograph 14 Lightning Conductor 15 Safety Lamps 16 Reaping Machine 17 Air Ship 18 Electric Telegragh 19 Liquid Air 20 Radium 21 Linotype Machine 22 Aeroplane 23 Pile Battery 24 Television 25 Telephone 26 X-Ray Photography 27 Photographic Camera 28 Pendulum 29 Steam Hammer 30 Aeroplane Gun 31 Sewing Machine 32 Printing Press 33 Steam Turbine 34 Tunnelling Shield 35 Slotted Aeroplane Wing |
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