| Description | Description of the 'bathtub' observation (on the transmission of sound through animal tissue) made by Elisha Gray in 1874, leading to his researching and patenting the design of prototype telephones. Commencing 'Says Mr Gray, My nephew was playing with a small induction coil, and, as he expressed it, was 'taking shocks' for the amusement of the small children...'
Elisha Gray (1835-1901) American electrical engineer and inventor. |