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 IV CONTENTS 



Three Great Achievements in Electrical Science. 



BY Ray Stannard Baker 183 



The Beginnings of the Incandescent Lamp. 



BY Thomas A. Edison 194 



The Triumph of the American Idea. 



BY Alexander H. Ford 198 



Power Employed in Manufactures. 



BY E. H. Sanborn 210 



The Utilization of Niagara Power. 



BY H. W. Buck 237 



Compressed Air and its Application in Mechanical Lines. 



BY W. O. DUNTLEY 246 



The Turbine Engine. 



BY Charles C. Fitzmorris 254 



The Copying of American Machines. 



BY Joseph Horner 260 



Invention as a Factor of American National Wealth. 



BY W. C. Dodge 267 



American Steam Engineering. 



BY Philip Dawson 278 



Progress in Engineering. 



BY Robert Heywood Fernald 290 



y" How the American Shoe has become Standard. 



BY George Houghton 316 



Needles and Pins. 



BY Charles M. Karch 327 



The Sewing Machine. 



BY John A. Boshard 339 



The Revolution in Watch-Making. 



BY William A. Countryman 351 



The Development of the Typewriter. 



BY Harry E. Barbour 365 



Labor Saving Systems Revolutionize Office Work. 



BY Hugh S. Fullerton 370 



