Mirror galvanometer for the transatlantic telegraph, 1858
1858
Thomson's mirror marine galvanometer, 1858
1858
Thomson's mirror galvanometer, 1858
1858
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
William Thomson's marine mirror galvanometer, 1850-1900
1854
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
Galvanometer from prototype Cox selenium-cell magnifier equipment, 1910-1920
1910-1920
Thomson mirror speaking galvanometer, 1858
1858
Weston galvanometer, model 375, 30-0-30
1926
Lord Kelvin's mirror galvanometer with lamp and stand, 1858.
1858
Telegraph Line Tester
1880-1920
Weston model 440 galvanometer
1926
Tangent galvanometer
1864-1886
Zernike galvanometer, by Kipp und Zonen, 1920-1930
1920-1930
Moving-magnet galvanometer
1890
Ballistic reflecting galvanometer, London, England, 1920-1955
1920-1955
Tangent galvanometer
1881-1926
Moving coil portable galvanometer
1890-1891
Sullivan patent portable galvanometer
1898-1913
Sullivan universal galvanometer No. 857
Astatic galvanometer
Galvanometer Telegraph
1859
Galvanometer Scale and Lamp Mounting Bracket on stand
1963
Moving coil galvanometer
1900
W. G. Pye string galvanometer
1910
Astatic galvanometer
1852-1870
Moving-magnet galvanometer
Small galvanometer.
1888
Tangent galvanometer, in mahogany case
1878-1900
Cambridge Scientific Instrument Company galvanometer
Moving-magnet null galvanometer
Moving coil galvanometer
1937
Moving-coil galvanometer
1906
Galvanometer, British Insulated and Helsby Cables Limited
circa 1902-1925
Bridge box
1900
Unipivot Galvanometer
1959-1961
General Post Office Differential Line Detector
1910-1920
Cambridge Instrument Company ballistic galvanometer
1955
Johnson and Philips thermogalvanometer
1906
Moving-magnet mirror galvanometer
Horizontal galvanometer, portable, Post Office form
1890-1930
Self-contained, reflecting pattern
1943-1970
Moving-magnet galvanometer
Linesman's galvanometer
Cambridge Instrument Company moving coil galvanometer
1960
Moving-coil mirror glavanometer made by the Cambridge Instrument Co. Ltd.
1935
Adjustable aperture on brass stand, accessory for galvanometer
1850-1924
Galvanometer, England, 1921
1921