Inventor primary source sets Alexander Graham Bell Thomas A. Edison Benjamin Franklin Elias Howe Elisah Graves Otis The Inventive Wright Brothers Inventor image set Books about inventors 1844-1939 Inventor related legislation More inventor primary sources Inventor-related images Books about inventors U.S. legislation related to inventors Invention primary source sets Inventions and Innovations primary source set…
Today in History–June 3–the Library of Congress features the invention of the photophone on this date in 1880 by Alexander Graham Bell. Although more famously known for the telephone, the photophone transmitted sound on a beam of light. This technology with the precursor to fiber optics which today transmits voice and data communications at the speed of light….
Today in History–March 10–the Library of Congress features Alexander Graham Bell, who made the first successful telephone call to his assistant Thomas Watson on this date in 1876. An audiologist, speech therapist and teacher of the deaf, Bell’s knowledge of the nature of sound likely encourage his experimentation. Another Bell invention was a metal detector, that was created to help…