Portable Gaiffe induction coil in mahogany box with mercury sulphate battery and assorted electrodes
1870-1880
Portable Gaiffe induction coil in mahogany box with mercury sulphate battery and selection of electrodes
1870-1880
Box, mahogany, induction coil
1901-1930
Portable Gaiffe induction coil with selection of electrodes and a 2 cell battery
1870-1880
Induction coil
1851-1900
Induction coil for producing faradic current
1900-1930
Coil for shocking patient
1880-1910
Induction coil, European, 1870-1910
1870-1910
Du Bois-Reymond sledge-type induction coil
1851-1900
Du Bois-Reymond induction coil
1959
Rectangular wooden box containing upright coil
1880-1890
Electromagnetic machine
1880-1900
Small induction coil in wooden box with trembler
Horizontal induction coil fitted into hinged side of rectangular box with dry cell
1870-1880
Vertical induction coil in rectangular wooden box
1900-1910
Induction coil
1801-1850
Cylindrical induction coil of vulcanite with multi-core mounted on wooden base with trembler
1890-1900
Electromagnetic machine in mahogany case
1900
Bobbin-type induction coil mounted on wooden base
1850-1860
Sliding induction coil on wooden base
1890-1900
Induction coil mounted on wooden base with trembler
1880-1890
Induction coil
1880-1890
Induction coil
1920
Crude induction coil in mahogany box with two loose switches
1900-1910
Induction coil for German military X-ray apparatus
1914-1918
Induction coil for generating a.c.
1870-1910
Induction coil
1840-1890
Induction coil for faradization
1880-1900
Primary induction coil, European, 1870-1910
1870-1910
Induction coil mounted on mahogany base with trembler
1880-1890
Portable Gaiffe induction coil
1870-1880
Induction coil
1851-1900
Induction coil
1900-1910
Electromagnetic machine
1880
Electromagnetic machine
1900
Du Bois-Reymond induction coil
1959
Induction coil
1851-1900
Horizontal induction coil with 2 batteries
1890-1900
Horizontal induction coil in rectangular wooden box
1890
Vertical induction coil with water regulator
1850
Induction coil (de Watteville's coil) mounted on wooden base with twin solenoid trembler and power switch
1890-1900
Horizontal induction coil with trembler arrangement and 4 terminals
1880-1890
Induction coil mounted on mahognay base with trembler
1880-1890
Velvet covered induction coil mounted on mahogany base
1880-1900
Portable sledge-type induction coil with unusually long (100 cm) wooden track
1900-1910
Induction coil and simple trembler arrangement mounted on wooden base
1890-1900
Induction coil in rectangular wooden case
1890-1900
Small induction coil mounted on small wooden base
1890-1900
Induction coil mounted on wooden base
1895-1905
Bobbin-type induction coil mounted on mahogany base with electro-magnet
1850-1860