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BY
ELMER ELLSWORTH BURNS
INSTRUCTOR IN PHYSICS IN THE JOSEPH MEDILL HIGH SCHOOL, CHICAGO
WITH MANY ILLUSTRATIONS
HARPER & BROTHERS PUBLISHERS
NEW YORK AND LONDON
MCMX
Copyright, 1910, by HARPER & BROTHERS
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À§´ëÇÑ ¹ß¸íÀ̾߱â.The Story of Great Inventions, by Elmer Ellsworth BurnsCONTENTS
CHAPTER I
THE AGE OF ARCHIMEDES
Archimedes the first great inventor.¡ªThe battle of Syracuse.¡ªArchimedes'
principle.¡ªInventions of the ancient Greeks Page 1
CHAPTER II
THE AGE OF GALILEO
Galileo and the battle for truth.¡ªThe pendulum clock.¡ªGalileo's experiment with
falling shot.¡ªThe telescope.¡ªGalileo's struggle.¡ªTorricelli and the barometer.¡ª
Otto von Guericke and the air- pump.¡ªRobert Boyle and the pressure of air and
steam.¡ªPascal and the hydraulic press.¡ªNewton.¡ªGravitation.¡ªColors in
sunlight Page 9
CHAPTER III
THE EIGHTEENTH CENTURY
James Watt and the steam- engine.¡ªThe first steam- engine with a piston.¡ª
Newcomen's engine.¡ªWatt's engine.¡ªHorse- power of an engine.¡ªThe Leyden
jar.¡ªConductors and insulators.¡ªTwo kinds of electric charge.¡ªFranklin's kite
experiment.¡ªThe lightning- rod.¡ªGalvani and the electric current.¡ªVolta and the
electric battery Page 34
CHAPTER IV
FARADAY AND THE FIRST DYNAMO
Count Rumford.¡ªCount Rumford's experiment with the cannon.¡ªDavy.¡ª
Faraday's electrical discoveries.¡ªOersted and electromagnetism.¡ªAmp£¿re.¡ª
Arago.¡ªFaraday's first electric motor.¡ªAn electric current produced by a
magnet.¡ªDetecting and measuring an electric current.¡ªAn electric current
produced by the magnetic field of another current.¡ªFaraday's dynamo.¡ªA
wonderful law of nature Page 5
CHAPTER V
GREAT INVENTIONS OF THE NINETEENTH CENTURY
Electric batteries.¡ªThe dry battery.¡ªThe storage battery.¡ªThe dynamo.¡ª
Siemens' dynamo.¡ªThe drum armature.¡ªEdison's compound- wound dynamo.¡ª
Electric power.¡ªThe first electric railway.¡ªElectric lighting.¡ªThe telegraph.¡ª
Duplex telegraphy.¡ªThe telephone.¡ªThe phonograph.¡ªGas- engines.¡ªThe
steam locomotive.¡ªHow a locomotive works.¡ªThe turbine Page 88
CHAPTER VI
THE TWENTIETH- CENTURY OUTLOOK
Air- ships.¡ªThe aeroplane.¡ªHow the Wright aeroplane is kept afloat.¡ª
Submarines.¡ªSome spinning tops that are useful.¡ªThe monorail- car.¡ªLiquid
air and the greatest cold.¡ªThe electric furnace and the greatest heat.¡ªThe
wireless telegraph.¡ªThe wireless telephone.¡ªWonders of the alternating
current.¡ªX- rays and radium Page 173
APPENDIX
Brief notes on important inventions Page 237
INDEX Page 247