Glass leyden jar from a d'Arsonval-type high-frequency electrotherapy apparatus

1890-1920

Glass leyden jar from a d'Arsonval-type high-frequency electrotherapy apparatus

1890-1920

Glass Leyden jar

1851-1900

Glass Leyden jar

1851-1900

Glass Leyden jar with tin plates

1851-1900

Electrode for skin, European, 1900-1930

1900-1930

8 leads for electro-therapy(?), European, 1900-191

1900-1910

Electrode from high frequency apparatus

1880-1910

Glass Leyden jar

1851-1920

Pair of electrodes for high frequency apparatus

1880-1910