David Edward Hughes (1831 sA?o??n?u 1900). Was a Welsh-Ameri

David Edward Hughes (1831 A?o??n?u 1900). Was a Welsh-American scientist and musician. Co-inventor of the microphone and teleprinter, inventor of the spark-gap transmitter and inventor of the crystal radio. Engraving by A. Carretero. The Spanish and American illustration, 1875. Colored

1831 Americana Arturo Carretero Co Inventor Co-inventor Espanola Ilustracion Personage Sanchez Spark Teleprinter Transmitter

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