EditorialDavid Edward Hughes (1831 ?A_i_ 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 Ameri...
EditorialDavid Edward Hughes (1831 ? 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 ...