Showing results for "telephone" in Science & Technology

Edwin Grosvenor writes of Bell's other extraordinary inventions: the first transmission of sound over light waves, metal detector, first practical phonograph, and early airplanes, including the first to fly in Canada. He also examines Bell's humanitarian efforts, including support for women's suffrage, civil rights, and speeches about what he warned would be a "greenhouse effect" of pollution causing global warming.

Born in Salem, Massachusetts, Thomas A. Watson (January 18, 1854 - December 13, 1934) was a bookkeeper and a carpenter before he found a job more to his liking in the Charles Williams machine shop in Boston. He was then hired by Alexander Graham Bell, who was a professor at Boston University. They were known for the invention of the telephone.

The biography of the teacher of the deaf who, through his knowledge of music, human speech, and hearing, invented the telephone. Bell was a pioneer in many fields that aided communication over distances. He worked tirelessly to help the deaf communicate with others (even Helen Keller came to him for help). After the telephone, Bell invented the photophone (a device that uses a beam of light to transmit sound wirelessly), and developed phonographic sound recording methods.