‘Medico-Electrical Machine’ by Nairne and Blunt
1782-1793
Trough battery, 1801-1838
1801-1838
Mirror galvanometer for the transatlantic telegraph, 1858
1858
Thomson's mirror marine galvanometer, 1858
1858
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
Set of magnetical apparatus in case, by Adams
1790
Crookes' tube for showing the focusing of cathode rays
1879-1888
Twenty four electrical radiometers illustrating Sir W.Crookes' research on electrical discharges in a vacuum
1879-1888
Early d'Arsonval galvanometer made by Carpentier
1882-1900
A.C. ammeter model 155
Small superconducting electromagnet
1965
Moving magnet gravity control "detector" galvanometer with 2
Moving iron ammeter with torsion head
Replicas of copper disc
1831
Ayrton & Mather electrostatic gravity voltmeter by R.W. Paul
1893-1901
Plug type bridge box and galvanometer
Pocket voltmeter, moving iron repulsion type
1910
Wire rheostat, 50 ohm 6 amp by Robert W. Paul
1900-1919
Moving iron meter
1927
Mercury interrupter
1860-1890
App's clockwork interrupter
1890
Moving-coil ammeter of a commercial design modified by E.H.W. Banner
1928
Potentiometer, by Gambrell Bros. & Co. Ltd.
Cardew's voltmeter, patent, no. 147 (Ediswan)
1890
Weston Normal Cell
1928
Early moving coil voltmeter
1889
Resistance divider box for use with potentiometer
Oscillograph, Cambridge Instrument Co. No. L 28466
1930
Sub-standard 1000 ohm resistance
1930
Rymer-Jones key
Motor driven oscillograph unit with "linear sweep" mirror
1925
Electrostatic oscillograph
1925
Weston normal cell by Cambridge Instrument Co.
Battery of nine Grove cells
Siemens dynamometer
1900
Twin element permanent magnet oscillograph in box
1910
Liquid crystal display as used in sthe Scopex Voyager oscilloscope
1982
Silver voltmeter, for international ampere determination
1907-1930
Pair of bar magnets
Kelvin astatic mirror galvanometer
1901-1913
Lindemann electrometer
1924
Standardizing and switching apparatus
1900
Boys' contact electricity electrometer, c. 1891
1891
Siemens experimental galvanometer
1900
Astatic galvanometer by Elliott Brothers, 1872.
1872
Fixed parallel plate device for measuring positive emission currents
1907-1908
Rotating spark
1872
Sectioned induction coil
1874
Resistance box by Elliott Bros., London
Wheatstone bridge
1932