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