Grigg's electromagnetic therapy machine
1886-1900
Grigg's electro-magnetic therapy machine
1873-1886
Grigg's electromagnetic therapy machine
1873-1886
Late C19 mahogany-mounted shocking coil apparatus
1860-1910
Complete Grigg's electro-magnetic therapy machine
1873-1886
Metronome current interruptor for electrotherapy by Schall of London
1905-1914