Bell to the American Association for the Advancement of Science, on Selenium and the Photophone, which will be found on another page. In spite of those who ingenuously attempted at the time of our ...

xxiii, p. 15, of Prof. Graham Bell's wonderful discovery, the transmission of speech by light, I notice that in “the photophone” the varying of the intensity of the beam of light thrown on the ...

For rapid communication between distant exploring or surveying stations, tbe photophone also promises to be serviceable. Another result of Mr. Bell's researche, in this connection is the discovery ...

A mere four years after patenting the telephone, inventor Alexander Graham Bell was already looking for ways to improve on his new technology. Specifically, he wanted to go wireless. Functionally ...

While Manos was unable to trace a specific source for this term, there was a similar device that had been invented some 20 years earlier: Alexander Graham Bell's photophone, co-invented with his ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Using light to send information has a long history: from ancient Greece, through Claude Chappe’s semaphore towers and Alexander Graham Bell’s photophone, to fiber optic networks and future ...