Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 486
unds tele-graphically. In this caveat he specifically states, It is the object ofmy invention to transmit the tones of the human voice through a tele-graphic circuit, and reproduce them at the receiving end of the line^so that actual conversation can be carried on by persons long distancesapart.…
Science · Technology · Meteorology · Patents
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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