GENERAL KNOWLEDGE - DISCOVERIES & INVENTIONS -2
| » Machine Gun | - | Dr. Richard Gattling | |
| » Maser | - | Charles H. Townes | |
| » Meson | - | Hideki Yakawa | |
| » Microphone | - | Graham Bell | |
| » Molecular Scattering of light in fluid | - | Ramanathan | |
| » Neon Gas | - | Ramsay, Travers | |
| » Neutron | - | Chadwick | |
| » Nuclear Fission | - | Otto Hahn, Bohr and Fermi | |
| » Nylon Plastic | - | Carothers | |
| » Origin of Species | - | Charles Darwin | |
| » Oxygen | - | J.B.Preistly | |
| » Parachute | - | A.J. Garnerian | |
| » Pencillin | - | Alexander Fleming | |
| » Periodic Law | - | Mendeleef | |
| » Photograph | - | Dauguerre | |
| » Photography (Film) | - | John Carbutt | |
| » Phonograph | - | Edison | |
| » Principle for lever (S.P.Gravity) | - | Archimedes | |
| » Phototherapy | - | N.R.Finsen | |
| » Pneumatic Tyre | - | Dunlop | |
| » Positive Electrons | - | Anderson | |
| » Powerloom | - | Cartwright | |
| » Printing for the Blind | - | Braille | |
| » Printing Press | - | Caxton | |
| » Printing Types | - | John Guttenberg | |
| » Psycho-analysis | - | Dr.Sigmund Freud | |
| » Quantum Theory | - | Max plank | |
| » Radio-activity of Uranium | - | Henry Becquerel | |
| » Radio transmitter | - | Alexanderson | |
| » Radium | - | Madame Curie | |
| » Railway Engine | - | Stephenson | |
| » Raman Effect | - | C.V.Raman | |
| » Rare Gas | - | Cavandish | |
| » Rayon | - | Sir Joseph Swan | |
| » Replacing human heart | - | Christian Barnard | |
| » Revolver | - | Colt | |
| » Refrigerator | - | James Harrison | |
| » Safety Lamp | - | Humphry Davy | |
| » Safety Match | - | Land Strom | |
| » Safety Pin | - | William Hunt | |
| » Safety Razor | - | Gillette | |
| » Seismograph | - | Roberts Mallet | |
| » Sewing Machine | - | Barthelling Thimonnier | |
| » Sextant | - | Hadley | |
| » Short Hand | - | Pitman | |
| » Solar System | - | Copernicus (1540) | |
| » Specific Gravity | - | Archimedes | |
| » Spectroscope | - | Bunsen | |
| » Steam Engine | - | James Watt | |
| » Steam Turbine | - | Parsons | |
| » Stethoscope | - | Rene Laennee | |
| » Submarine | - | David Bushnell | |
| » Steam boat | - | Fulton | |
| » Submarine | - | Bushwell | |
| » Tank | - | Swinton | |
| » Talkies | - | Lee-de-Frost | |
| » Telegraph Code | - | Morse | |
| » Telephone | - | Alexander Graham Bell | |
| » Telegraphy | - | William F.Cooke. Charles Wheatstone | |
| » Telescope | - | Galileo | |
| » Television | - | J.L. Baird | |
| » Theory of Evolution | - | Charles Darwin | |
| » Theory of Relativity | - | Albert Einstein | |
| » Thermosflask | - | Dewar | |
| » Transistor | - | Shockly and Bardeen | |
| » Typewriter | - | Sholes | |
| » Uranium fusion | - | Oho Hahn | |
| » Uranus (Planet) | - | Herschel William | |
| » Vaccination | - | Jenner | |
| » Vaccum Flask | - | Sir James Dewar | |
| » Vulcanisation | - | Good Year | |
| » Washing Soda | - | Lablanc | |
| » Wireless Communication | - | Oliver Lodge | |
| » Wireless Telegraphy | - | Marcony | |
| » X-ray | - | W.C. Rontgen |
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