Mirror galvanometer for the transatlantic telegraph, 1858
1858
Thomson's mirror marine galvanometer, 1858
1858
Thomson's mirror galvanometer, 1858
1858
William Thomson's marine mirror galvanometer, 1850-1900
1854
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
Vertical galvanometer, 1830-1870
1830-1870
Moving magnet galvanometer with dial inscribed "Greenwich Mean Time", 1843-1897
1843-1897
Henley needle galvanometer, 1855-1860
1855-1860
Thomson mirror speaking galvanometer, 1858
1858
Galvanometer from prototype Cox selenium-cell magnifier equipment, 1910-1920
1910-1920
Weston galvanometer, model 375, 30-0-30
1926
Lord Kelvin's mirror galvanometer with lamp and stand, 1858.
1858
Telegraph Line Tester
1880-1920
Tangent galvanometer
1864-1886
Weston model 440 galvanometer
1926
Sullivan patent portable galvanometer
1898-1913
Moving-magnet galvanometer
1890
Zernike galvanometer, by Kipp und Zonen, 1920-1930
1920-1930
Moving coil portable galvanometer
1890-1891
Ballistic reflecting galvanometer, London, England, 1920-1955
1920-1955
Tangent galvanometer
1881-1926
Sullivan universal galvanometer No. 857
Galvanometer Scale and Lamp Mounting Bracket on stand
1963
Galvanometer Telegraph
1859
Astatic galvanometer
Moving coil galvanometer
1900
W. G. Pye string galvanometer
1910
Astatic galvanometer
1852-1870
Moving-magnet galvanometer
Small galvanometer.
1888
Cambridge Scientific Instrument Company galvanometer
Moving-magnet null galvanometer
Tangent galvanometer, in mahogany case
1878-1900
Kelvin & James White moving coil galvanometer
1903
Moving coil galvanometer
1937
Moving-coil galvanometer
1906
Unipivot Galvanometer
1959-1961
H. Tinsley & Co mirror galvanometer
circa 1910
Galvanometer, British Insulated and Helsby Cables Limited
circa 1902-1925
Bridge box
1900
Ayrton & Mather galvanometer, 1901-1908
1901-1908
Horizontal galvanometer, portable, Post Office form
1890-1930
General Post Office Differential Line Detector
1910-1920
Cambridge Instrument Company ballistic galvanometer
1955
Moving-magnet mirror galvanometer
Johnson and Philips thermogalvanometer
1906
Self-contained, reflecting pattern
1943-1970
Linesman's galvanometer
Moving-magnet galvanometer
Moving coil galvanometer by Evershed & Vignoles Ltd
1908