495
X-ian - Christian.
Y.M.C.A. - Young Men's Christian Association. Y.W.C.A - Young Women's Christian Association. Y.M.I.A. - Young Men's Indian Association.
( 22, INVENTIONS AND INVENTORS D
No. Inventions Inventors Year Country
1. Airplane with motor Wright Brothers 1903 U.S.A. 2. Bakelite Backland 1907 Belgium 3. Cinema Thomas Alva
Edison 1889 U.S.A. 4. Computer,
Electronic Eckert Manchly 1946 U.S.A. 5. Diesel Engine Diesel 1895 Germany 6. Dynamite Nobel Alfred 1962 Sweden 7. Dynamo . . Faraday 1831 Britain 8. Engine, Steam Piston Brown 1823 Britain 9. Gyroscope Foucault 1852 France 10. Helicopter Oehmichen 1924 France 11. Kaleidoscope Brewster 1817 Britain 12. Locomotive Stevenson 1829 Britain 13. Microscope
(Electron) Knoll Ruska 1931 Germany 14. Microphone Berliner 1877 U.S.A. 15. Nutron James Chadwick 1932 Britain 16. Nylon Du Pont 1937 U.S.A. 17. Pen Ball Point Loud 1888 U.S.A. 18. Pen, Fountain Waterman 1884 U.S.A. 19. Penicillin Alexander Fleming 1928 Britain. 20. Phonograph Thomas
Alva Edison 1877 U.S.A. 21. Radar Taylor &
L.C. Young 1922 U.S.A. 22. Radium Pierie Curie and
Marie Curie 1898 France 23. RadioSignals Marconi - 1895 Ital 24. Sub-Marine Holland 1895 U.S.A. 25.Television Baird 1926 Britain 26. Atomic Theory John Dalton 1827 England 27. Transistor Shockley
Brattain, Bardeen 1947 U.S.A.
