Galvanic apparatus
1870-1910
Cylindrical induction coil of vulcanite with multi-core mounted on wooden base with trembler
1890-1900
Electrode for Grigg's magnetoelectric machine
Stand used in the electrostatic pith ball experiment
1851-1900
Cylindrical application electrode
1900-1910
2 electrodes in test tubes, European, 1900-1910
1900-1910
Application electrode, European, 1900-1910
1900-1910
Dish-shaped application electrode
1900-1910