Alexander Graham Bell

Aggiungi una trama nella tua lingua"You have a gem of a great idea, if you can perfect it," Joseph Henry of the Smithsonian Institute tells Alexander Graham Bell when he presents his theory for the invention of the telephone.... Leggi tutto"You have a gem of a great idea, if you can perfect it," Joseph Henry of the Smithsonian Institute tells Alexander Graham Bell when he presents his theory for the invention of the telephone. When Thomas Watson and Bell begin their work for a multiple telegraph, Bell becomes convi... Leggi tutto"You have a gem of a great idea, if you can perfect it," Joseph Henry of the Smithsonian Institute tells Alexander Graham Bell when he presents his theory for the invention of the telephone. When Thomas Watson and Bell begin their work for a multiple telegraph, Bell becomes convinced that he can send the complex sounds of human speech over a wire from its vibrations. ... Leggi tutto