Hubert, Philip Gengembre, 1852-1925 · New York, C. Scribner's Sons · leaf 254
afterward to invent thephonograph. TU tell you how this came about. THOMAS A. EDISON 237 After thinking over the matter a great deal, Icame to the point where, in 1877, I had workedout satisfactorily an instrument that would notonly record telegrams by indenting a strip ofpaper with dots and dashes… … Edsons Tinfoil Phonograph—the First Practical Machine. tions and their transmission by diaphragms.Naturally enough, the idea occurred to me: ifthe indentations on paper could be made togive forth again the click of the instrument, whycould not the vibrations of a diaphragm berecorded and similarly…
Inventors
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