Items tagged psilomelane in MV Collections

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  • Mineral - Radio Detector, Silicon, 1901-1920 Object

    Mineral - Radio Detector, Silicon, 1901-1920

    One piece of psilomelane (Manganese Oxides), used in a radio detector. Properties discovered by Karl Ferdinand Braun after 1874. First marketed as a detector by Telefunken in 1901. Poss ...

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