دانلود کتاب Edison: A Biography

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A great folk hero in American history, Edison is viewed by the public as a facile inventor, the electrical wizard and the perfect symbol of the self-made and practical creator. But he was also a paradoxical figure: deaf, impoverished and with no formal education as a youngster, Edison nevertheless became a fertile and versatile inventor, accumulated fortunes for himself and others but remained indifferent to wealth except as a means towards more inventions. Edison’s key contributions include the carbon microphone, the electric light bulb, electricity distribution systems, the phonograph and the motion-picture camera. Edison’s methods were also remarkable: halfway between the craftsman-tinkerer of the early 19th century and the scientist of today, he established and ran pioneering research laboratories with large staffs, yet lacked training in mathematics or the basic sciences.