Originally published under the title: Who invented it & what makes it work?
Contents
Eli Whitney -- Elias Howe -- Guglielmo Marconi -- Ives McGaffey and John Thurman -- John Walker -- Charles D. Seeberger -- Alexander Graham Bell -- Elisha Otis -- Samuel Morse -- Whitcomb Judson and Gideon Sunback -- Thomas Edison -- Louis Daguerre -- Johann Gutenberg -- Orville and Wilbur Wright -- Benjamin Franklin -- Christiaan Huygens -- Galileo Galelei -- John Gorrie.